Constant Automated Calls

I am perpetually receiving automated calls from African Bank trying to sell me credit cards!

This is directly at odds with the Protection of Personal Information Act which prohibits unsolicited digital communication.

Blocking the numbers doesn't even help because they constantly change, just today I received calls from 4 different numbers and it's not even 12:00, yesterday it was a different 4 numbers!

My job involves being on the phone and every second I'm on the phone with an African Bank automated marketing call I am not doing my job.

Please, please, please African Bank leave me alone - I don't even know what to do about this anymore, I've tried everything to get away from the constant bombardment :-(

I really don't want to have to change my phone number :-(

It's really hopeless I want to cry - my phone just keeps on ringing