Hey Joey08 - have you tried registering with the Telephone Preference Service? It doesn't totally solve the problem but my nuisance calls dropped off dramatically after I did this (once you're registered it's illegal for anyone to be cold calling you. Some still do, but if you tell them you're registered with the TPS and will be reporting them they disappear sharpish).
http://www.mpsonline.org.uk/tps/HTH.
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