NewsCenter 5's consumer reporter Susan Wornick first reported on the questionable business tactics of Uni-Kleen in 1999. Watch NewsCenter 5's Susan Wornick Dozens of customers have taken their complaints about the Canton company to the state contending that Uni-Kleen's coupons are merely come-ons. Wornick reported that the state attorney general's office is listening. "Oh yeah, I got ripped off all right," Winnie King, a Uni-Kleen customer, said. King felt duped after using a coupon from Uni-Kleen. What she expected to be $99.95 to have her air ducts cleaned turned into a bill for $728.90 "I would have liked to pass out. I was a nervous wreck," King, who lives in South Boston, said. Reluctantly, King wrote a check. But after studying the bill, she discovered in addition to the basic cost , she was charged $189.00 for cleaning the furnace, $75 for cleaning the air conditioning coil and $40 for something described as cut-ins required for resealing. King said that she never approved that work and doubts it was really done "He did not clean my furnace because that's gas and it's in the cellar. He did not clean the coil because it's outdoors inside a compressor and I've got directions on how to open the compressor," King said. King thinks that the technician took advantage. "I guess he figured she's an old lady sitting there and I got it made," King said. Complaints about Uni-Kleen, which also goes by the name New England's Finest, are not new. NewsCenter 5 conducted an undercover investigation in 1999 and confirmed what dozens of consumers had told us -- that coupon offers were worthless. Consumers said that once in their homes, technicians used high pressure tactics to sell services and inflate bills. After NewsCenter 5's investigation, owner Ed Pero sent us a letter expressing concern and promising change. But since that time, state consumer officials report more than 75 new complaints and not just from consumers. Former employees also say they were misled. "It's basically just a big scam to the consumers," Tom Waugh, a former Uni-Kleen employee, said. Brothers Tom and Gaynol Waugh worked briefly as Uni-Kleen technicians last year cleaning carpets and air ducts. Both quit. Tom after three months and Gaynol after three weeks after feeling pressured to get as much money as possible by convincing customers they needed more than just the basic coupon offer. "They'd say, 'Ruin their day. Get their money. Take them for all they're worth.' Those were the common phrases you'd hear everyday," Tom Waugh said. Gaynol Waugh said that he was once told to exploit a customer's grief. "The guy behind the counter hands me the slip. He says, 'You know, here's a guy. He just lost his wife, very vulnerable. Go there. I want you to listen to him. I want you to be his friend. And then I want you to get in there and I want you to take him for all he's got.'" Gaynol Waugh said. And according to the Waughs, they were sent out to clean air ducts and carpets without being properly trained. "That's an absolute lie," Johnnie Vernon of Uni-Kleen said. Uni-Kleen owner Pero wasn't available to comment, but in an interview at his attorney's office, customer service representative Vernon told NewsCenter 5 that Uni-Kleen employees go thru about 50 hours of classroom training and observation before going out on their own. He said that the face value of the coupon is always honored when the customer asks and complaints about changing the deal just aren't true. "I believe bait and switch is when you offer a customer a product, go to their home, try to sell them something else and not give them that product. We do not do that," Vernon said. But the attorney general's office isn't so sure "It sounds like bait and switch," Alice Moore of the state's attorney general's office said. The attorney general's office has negotiated more than a dozen complaints over the 26 months Uni-Kleen has been in business. According to Moore, they're all very similar. "Mostly that the coupons for $8.95 or for whatever the coupon appeared to be actually turned into significantly higher costs for the customer for various reasons. This activity should not be continuing," she said. If you'd like to log a complaint, contact the attorney general's hotline at (617)727-8400.