faulty laptop from Mondo and Mtn

I took out a mtn contract with mondo(i didnt even know it was mondo and not mtn) for a mecer guru pro, i recieved the beautiful laptop on the 8th of july 2021, on the 11th of july 2021 the laptop stopped working, i tried charging but nothing helped, i called mtn on the 12 th july 2021 to report the problem and they gave me a contact number for mondo and asked me to contact them directly, but with the unrest that was happening in the country i couldn't get hold of mondo telephonically so i emailed them and got the automated responce first then 2 days later another email informing me that due to the nationwide unrest there will be delays in their response but my complaint is noted and will be attended to. Eventually i got an agent after several attempt and he asked me to take the laptop to my nearest mtn store and when i got there, the agent from mondo and the assistant at mtn could not agree so the agent from mondo said i should keep the laptop and a courier will be sent to collect it from me. i requested for a new laptop which i was told i could not get, so i requested that the contract be cancelled as i will not accept a repaired laptop especially since it is still brand new, it might give me problems in the future... to date no one has collected the laptop, mtn continues to debit my account for this contract, i cant get through to anyone at mondo and my emails are just ignored or I'm told the courier has been logged to collect the laptop... will this contract still be cancelled after a whole month has passed and why am i paying for a faulty device even after reporting it.