Totally BAD, POOR SERVICE!

In the beginning of July2020, I was contacted by REWARDSCO, some company that sells contracts for MTN, not sure exactly how the relationship between the two companies work.

Anyway, I took out a contract "MTNCHOICE 5GBSUBS FEE" through them with MTN. I was told that it takes up to 24hours for the device to be activated, 3 days later the device still did not work, long story short, I depleted my airtime trying to contact both MTN and REWARDSCO, with no luck, due to Covid19 all lines were extremely busy....I returned the device to a MTN store and asked for the contract to be cancelled, this I did before the 7 day return policy was up. Now I am getting bills where I am being invoiced for said contract that I have cancelled, I tried phoning, again, and again, with out my calls going through, "high call volumes due to covid19" The service thus far from both MTN and REWARDSCO is totally and utterly disappointing, all I want is for someone to tell me why this contract has not been cancelled as it should have been, and what they are planning on doing with regard to crediting my MTN so that I do not get billed for something I do not have the use of..

Totally and utterly irritatingly frustrated!