Extremely poor service and support

Good day

I am appalled by the quality of service I have received with MTN as I am a loyal customer for more than 15 years! This issue has been dragging on for more than 3 months now and still nothing is done to resolve it. Back in July 2024 a Mondo consultant phoned me saying I was liable for an upgrade on my existing number. When I received the device I noticed there was a sim card included. I phoned MTN and they said Mondo took out a new contract. I did not give consent for a new contract, which MTN confirmed. I immediately cancelled the contract and sent back the device. I gave them the IRMS number. They informed me they will cancel it. I noticed on my banking app they tried to debit me so that is when I realized they never cancelled the contract. So each month the outstanding amount increases.I've been phoning everyday for a month asking for this to be sorted. It is a constant back and forth between different departments! I am on the phone with Mondo everyday for 2 hours. Now they are saying the contract can't be cancelled because of the outstanding amount. Firstly, if they cancelled it back in July when I asked them there would have been no outstanding amount. Secondly, I did everything right from my side, returned the device and gave them the IRMS number. The contract is not even active. They have escalated this numerous times and still nothing is done. I have spoken to all the departments and no one is cancelling the contract. And to top it all, Mondo blocked my number, so I can't phone them regarding this!!!!! Mondo is liable and not me. They should clear my account and cancel this contract. A contract i do not have, a contract I did not give consent to. To this day Mondo has never phoned me. I have posted a review and the reply I got...they'll phone me. All lies! See attached. I reached out on facebook and again...no assistance! As I stated previously, Mondo blocked my number...so I can't even phone them!