MTN - ABSOLUTELY APPALLING SERVICE!!!

Towards the end of 2018 MTN sold me a modem/router on contract. From day one it did not work despite my having visited the Steenberg Village store numerous times and contacting the call centre. At the beginning of 2019 I returned the modem to MTN and they confirmed that the modem did not in fact work and they would credit me in terms on the Consumer Protection Act. SIX MONTHS LATER THEY HAVE STILL NOT PROCESSED THIS CREDIT. IN ADDITION, THEY HAVE NOW CHARGED ME AN ADDITIONAL R3000 FOR EARLY CANCELLATION OF THE CONTRACT. As as result of this - their sloppy attitude and total lack of customer service, they now refuse to renew my cell phone contract with them that I have paid on time for more than 20 years. Unbelievable, disgusting and indescribable - how arrogant and shocking their service is literally defies description!