Pathetic service iro upgrades

I have been trying to upgrade my daughters contract since 26 November 2021. I have requested call-backs, called 135, sent emails to customer care, gone into stores all to no avail. Almost one month later I get told by your staff that they cannot assist me as I am on the old system, hellious, and not the new system. Every single time I asked to be put through to a team leader the call was cut. The stores tell me that they cant assist as the are a franchise and not part of MTN Direct. What ******* is this. Its branded MTN therefore you should help your loyal customers. You are making your internal system issues my problem which is not acceptable. Please get someone with access to the correct system to call me as I want to finalise this upgrade today.