No Service from MTN at all!!

I am utterly astounded that MTN SA has absolutely no customer service whatsoever. We have been paying my husbands cellphone bill every month into an account that i have had on my banking profile for more than 10 years. I have used his Account number as a reference, i have used his cell phone as a reference and each and every month they will suspend his phone. We have sent through POP's of each and every payment. Each month we have to go through the same scenario and speak to a completely different consultant (who works from home). I have emails i sent to each and every person, but somehow their mtn.com email addresses never work. They never receive them and after sending to the consultants' private mail, they receive them. I have copied in customer care, they never respond. I try to talk to a manager, they are never available. We have had the run around since October 2021, and no-one is taking this seriously. We refuse to pay the outstanding balance of over 3K when we have paid and have the proof. One of the consultants came back last month and said that it's been paid into the wrong account. How does this happen without our knowledge? I have used that account for years. We have now decided to pay this months invoice at an MTN store, just to make sure it will reflect. I am at my wits end and will not recommend MTN as a service provider. I would like someone in charge to give me a call and to sort this out once and for all