MTN customer care disappointing

On the 29 September, I was called by a MTN consultant to upgrade my contract as it was comming to an end. The consultant offered me a good deal with 150gig ma data. I enquired about minutes as i was receiving 100 minutes with my current contract. The consultant asssured me that I will receive 100 minutes with my contract. However since my upgrade I did not received any minutes. I have been contacting and emailing MTN on numerous occasions but I’m getting no assistance. I’m highly frustrated with MTN as they keeping putting me through different departments and promised my query will be redo within 24-48hours. It’s 2 months and my query is not resolved. I called MTN cancellation as my last resort to cancel my contract and the consultant at cancellation said she will resolve the issue and not to cancel. It’s 2 weeks since my last call and still not resolved. MTN customer care is useless and not up to standards. I have spent hours on the phone with MTN was to no avail. I will cancel this contract and use another service provider.