Worst customer care in the world

I received the MTN LTE Wireless Router ZLT S50 and sim card on Monday 30th of September and went through the RICA processed with the courier, He took my paperwork and finger prints, but he failed to tell me that their system failed due to a technical error on their system.I have called the customer care line but they could not do anything apart from sending me to a MTN store but there isn’t one where I live. they said I could RICA on the app and at PEP store both of which failed as the number is too long

Over the last few days I spent over R100 ***ing to resolve this issue and a number of emails with no consistency with the customer care agents all have given different information and contacts numbers and none can resolve the issue and now they say call 135??? No help. I managed to get the phone number to the sim card and logged in to the mtn app only to find they billed me R872.29 on the 30th of September instead of the R429 plus the pro rota fee of R85 total R514 - please don't waste you time or money with MTN