I am so careful with my phone number. Only give it to trusted organisations. I suspect this is linked to the m&s breach or something similar because since around that time, I have been receiving up to 10 spam phonecalls a day. It is driving me insane. I really don't want to change my phone number but am feeling like I might have to. I block them every time but just keep getting calls. Is anyone else being bombarded with spam calls?