Hi,
Some insider's knowledge, which will proabbly annoy the hell out of you all.
When I was in my late teens, and was looking for a part-time job to fit around college, I applied to do some telephone work for a local firm. It turned out to be a "cold calling" job for a local double-glazing firm, and I immediately rejected the interview job offer, on the principle that I loathed these companies and how they hassle customers.
Anyway, I discovered during the interview, that even when you ask for your name, address, phone number and other details to be removed from these companies lists, they do take them off. However, your details will go back on within three months, as they "update" their databases every three months, and simply go back to getting your details from the Electoral Roll again.
Hence, even if you ask for details to be removed, you'll be back on their lists again, and therefore, you'll probably end-up getting a call from the same company a few months later.
As such, you're stuffed!
Pooch