Best thing to do if you answer the phone to anyone like this is tell them that you want some info, they will send you a load of stuff then return the prepaid envelope back to them with some junk of your own in it, it will cost them money, the only downside is they then have your address but if like me you are an ex customer they will have it anyway, I love sending prepaid envelopes back with rubbish in, if we all did it it might stop the pile of junk mail that comes through your door and the cold calls that everyone gets.