I get loads too. They tend to ring mid afternoon, just when I am having my nap.zzzz - bastardos!!!
TPS registered- I think I need to renew it and see if that helps.
I also get loads from debt management companies - asking if I have sorted out my debt problems. I tell them that i am an exceedingly wealthy woman and have no need for a loan 
I am not an exceedingly wealthy woman... 