MTN South Africa Pathetic behavior and service -10

So for over a month now I have requested a proof of refund from MTN. The manager Zakia Appalsamy who is supposed to be assisting me has stopped to assisting me. This is the normal behavior and customer service I have to deal with. As a customer I have a right to the proof of refund. I sent MTN my bank statement,and now they want a further 3 months. Remember I called MTN to resolve the issue. They have closed the only line of contact I have app**** for jobs and I run my own business plus I work. MTNs lack of service has become deplorable. You sponsor pirate rugby but your credit control and financial team is the most useless bunch of people. How can you not provide a copy of this so called refund which MTN apparently refunded on the 11/01/2022. Refunds take 3 - 5 days max to clear, so a bank statement up until the 22 is ample proof that no refund was done. I requested a copy of the refund so I could take it to FNB so that they could confirm if the funds have come into my account. Until today, no response, no feedback. As usual pathetic, I don't even think the consultant who contacted me is a Manager, because her lack of service delivery and urgency is truly deplorable. I will admit I sent a nasty email and I still had not response. Yet again I am chasing MTN to resolve the mess they have created. I am so tired of this nonsense. I will never ever recommend your business ever. Pathetic service -10 customer service and response time. Absolutely disgusted.