MTN / REWARDSCO - UNRESOLVED ISSUES

MTN / Rewardsco I took out a Fixed LTE Contract in December via Mondo, who did NOT ask for an address to be specified to see if coverage was available. To cut a long story short, this contract had to be cancelled and it was agreed by Mondo that the error was on their side. The router and Sim card were collected in Jan, but MTN very happily deducted 3 months subscriptions even through I was not using the service, then had the audacity to charge me a cancellation fee. After all that, they have now suspended my main account due to "non payment" for charges that I should not have been charged for. I have emailed and phoned, and no one actually gives a dam and won't assist. I am getting shoved from Pillar to Post! Someone needs to sort this out URGENTLY! I have emailed / phoned and no one wants to assist in this matter. Rewardsco send me to MTN and MTN send me to Rewardsco, YET, MTN has suspended my account, charged me for subscriptions and cancellation fees.