MTN home router is nonsense, No Help what's so ever from customer service just delay tactics

I recently bought a home router on the mtn online store and they delivered the device then I connected the device it worked for a week then they disconnected my internet as they debited my account 2 times in one month which I had to dispute the debit orders, I then contacted them multiple time they kept saying I need to pay close to R1000 for the month of August because there is no funds located to my contract on their side which didn't make sense I then sent them proof of payment and bank statements they further required detail proof of payments which made no sense to me as I send bank transaction scripts to them, I get emails saying my ticket is being closed but the issue is not resolved, I'm using MTN prepaid for more than 10 years now but they have definitely lost a customer now