Just tried the Orange toll free number and it's working, not sure why you cannot use it Kev sorry about that :(
Thanks for the tip about call blocker Al, but if I use call blocker I would still receive the text from Orange telling me I missed the call I blocked, which is the problem (as my blocker is working) and they refuse to stop sending them, but instead of deleting the messages, I'll collect a few more and go to the police station and denounce them and I can use the missed call messages from orange as proof :)