Maybe I shouldn't have posted here as I'm after a different solution to those offered to me, although I thank you for responding, the money is an irrelevance, its a matter of principal in asking for money to cease harassment calls which I think is disgusting. I've registered with TPS and will switch providers. What I was after was a way to give BT grief, maybe I'll go the CEO route

My mother has been recently been receiving 4 or 5 nuisance marketing and phishing calls per day from one company so I rang BT on her behalf to ask for a stop to be put on the particular number making these calls as she was an elderly lady and it was making her ill with stress, they advised me that I could either register with the TPS which would mean that after 28 days, hopefully the calls would stop, or they could block it for me within 24 hours providing I was willing to pay for a £3-4 per month service. Surely this can't be right, requesting payment to stop harassment calls? I'm fuming and want to hurt BT, other than moving to a different phone provider, any ideas?