Absolutely appauling service from MTN!

I purchased MTN's home internet month-to-month products on the 1st of August 2024 via MTN's online shop. Note that before you are allowed to purchase this there is a check to ensure that there is coverage in your area. Once that has been sorted you are taken to the next steps and end up having to pay. I paid via card which, as we all know, does not give you the option to add a payment reference, only card details. Upon payment I was charged for a full two months' subscription, which I paid, no problem. I received the router on the 8th of August. To keep this short, after numerous phone calls to MTN customer care, technical, accounts, the wifi finally started working around the 22nd of August. Note, once again, that I paid for a full month. So, on 1 Sep, I receive an invoice and statement showing that I owe MTN almost THREE months' subs. This after having had the full use of the router and working wifi for only a few days and having already paid for Sep upfront. Once again I spend a lovely 30 minutes on the phone with a customer care agent and once again I forward my 1 Aug proof of payment which, by the way, had never been allocated to my account. I get told that the problem has been escalated to the accounts department and I will be informed when it is sorted. The next day the full amount owing (according to MTN) is auto deducted from my account! I remained calm through all of this, but have honestly had enough now. I would love to send this router straight back to MTN but am really not up for the fight to get my refund. This so-called major comms service provider has a massive problem with communications within their own company! Totally unacceptable!!