I've been fine with recruiters until i came to berlin and somehow let my phone number slip to the uk recruiters. Now, I'm trying to figure out how to block all

I've been fine with recruiters until i came to berlin and somehow let my phone number slip to the uk recruiters. Now, I'm trying to figure out how to block all uk numbers, nothing I can say will make them stop cold calling me, and they're so aggressive it's hard to escape a call without being rude. I really don't get why uk recruiters in particular are so awful, the German ones are fine.