MOBILEPLUS and Mtn services

Somewhere between April and May 2018, I got offered an MTN CONTRACT from MOBILEPLUS. I took it I was supposed to get a Huawei phone but on delivery I only received sim cards after waiting for 2 weeks and a few days.. I was disappointed with this terrible service. I phoned the customer care and told the to cancel the order as it has taken way to long to receive my device and then 6 months later only to realise they have been debiting money off my account. I can't how many times I phoned Mtn and MOBILEPLUS for them to cancel and credit me back as they've been charging me for a device I never received.. Still today they haven't and my name is now dragged as I cannot open other accounts due to this. This is such bad service from these people.