Sorry part of my role is trying to defeat fraud, what you say above is okay but realistically won't do anything with the scammers, they don't care about TPS, they are mainly offshore so even if they did TPS have no control over them anyway. As to changing the number, that isn't going to help really as there are 2 methods of calling, first is literally look at a phone area & call every possible number there is available, this tends to be the Microsoft scam type. The other is more slightly more sophisticated which tends to be a text coming from your bank, this must have an element of 'inside' job, so if you change your number they will get updated.
I had a number reported yesterday, I rang the number to be greeted with a very professional IVR with a very nice accented lady saying Welcome to [Bank] fraud department, please enter your 8 digit account number, I entered an 8 digit number, she then asked for my 2nd & 4th pin number, to which was responded I'm sorry we didn't get that please enter your 1st & 3rd pin numbers. Then I'm sorry there appears to be a problem, I'll put you through to one of our Fraud prevention officers. I didn't bother & put the phone down.
I was also talking to a bank representative yesterday as well about an hour before that episode & he advised a few weekends they had had 24 events such as above which resulted in over £2million being removed from their customers accounts.
If you can obtain the numbers that have called, their CallerID, report them to ICO, Ofcom Action Fraud, your telephone provider & if you want you can also go to
http://static.ofcom.org.uk/static/numbering/index.htm to find out who owns the number & report it directly to them. Although be aware that just because the CallerID is xxxxxxxxx it may not mean that is where the call has come from.
If you ever get a text, email from your bank NEVER use the number that is on the correspondence, ALWAYS either use the one on the back of your card, or go to the website & find one there.