Stay away from MTN contracts- never will get help

Purchased a second contract with MTN, should have re considered due to always bad service the first time. And incomplete sale with the consultant over the phone led to a wrong device delivered to me. I was told to return it to an MTN store and not a franchise and I try calling all stores in my area none on them can answer or be of help. I'm stuck with the problem to ensure its returned within 10 days or I'm liable for costs. Strong network but most weakest customer support in Africa