MTN customer services very poor and not helpfull

I am trying now since May 2020 to get hold of someone in the finance department to sort out my account. Firstly in May it was debited double the amount. I immediately reverse debit order and paid the correct amount as was stated on my invoice. Then in June the same happened and paid again. I made a payment on 17 June which amount is still not allocated into my account. I went to the store at my hometown and also made payments. I have phoned customer service which is useless and there is 14 tickets lodged and still nobody has allocated the money to my account. My services was terminated twice. This is *****. With 20 emails send to customer services and the persons who I spoke to nobody is helpfull. This is the worst service provider ever and I would not recommend MTN to anyone.