vodacom won't register my number after contract cancellation

So I had a contract with mr price and cancelled it. I was then told that I needed to go to a Vodacom shop and re-register my number again and perform a sim swap. I go to Vodacom today and they are now telling me they can't register my number because they don't know if it belongs to me. I show them smses, whatsapp numbers and emails that proves that I'm the owner of the number. They still couldn't help me. Mind you, this is the number I've been using for over 10 years and linked to everything from my bank accounts to 2 factor authentication for my emails, everything basically. Now I don't know what to do to get my number back. This is not on