MTN Beaufort-West service sucks.

About just over a year ago I bought a 10.1 inch tablet from MTN Beaufort-West on contract. After about 3 months the charger did not work and I took it back to MTN. According to my contract if the tablet or accessories are faulty it must be replaced with a new tablet. This did not happen they only send my old charger in for repairs. On 30 October 2018 the same thing happened again. I took it to MTN on 1 November 2018. On 20 December 2018 I enquired about my tablet and they said it has not come back from repairs. On 28 December 2018 I went to pay my account and made another enquiry. MTN phoned repairs that just confirmed the tablet and charger is still at repairs. Early January 2019 I paid my account again and still now tablet no news of the charger being repaired. I am about to make another payment again soon. The problem is that I have 5 contracts with MTN and if I do not keep this account payment up to date all my other accounts will be suspended. I am therefore paying for a tablet for 3 months now without having the actual tablet or use of my airtime. I want MTN to replace my tablet but all they say is that this not their problem it is a mobicell tablet but I still have my contract with MTN. I will never recommend MTN to any person I know.