There's nothing more annoying than companies who keep calling to try to sell you things. I had a call recently from someone John had problems with in the past, and I remembered them. I said, I would not buy anything from you EVER, if you were the last company in the world!!

One thing that worked for a friend of ours, years ago was this; he sent them a fax after the office closed in the evening... with one word on each page. The next day when they came in, they had a roll of fax paper laying around all over their floor. I don't think the guy ever heard from them again.