MTN = Worst Customer Service Ever!!!

My contract was due for an upgrade 6 March 2021, but I decided to cancel my contract and go Pay As You Go. Funny thing is, they've phoned me +- 31 times to upgrade, but when I phone the number they gave me to cancel the contract, THEY DON'T ANSWER AT ALL... I then went to 4 different MTN stores, desperate for help, they all told me to phone 135 and choose options 3 and 0. Apparently they can't help me in store. I told them that's the number I'm phoning, but no one answers. The last MTN store told me they can't help me in store, but I must phone 135 quickly before 5pm, because they're going home then. THIS IS THE WORST CUSTOMER SERVICE I'VE EVER EXPERIENCED IN MY WHOLE LIFE!!! How they can be voted South Africa's most valuable brand is beyond me. We've been loyal MTN customers since 1997. The moment I can rid myself of these useless people, I'm off to the opposition.