MTN Upgrade Troubles

Dear MTN

This is really not a complaint not compliment, but im seeking clarity on a small.

So one of my lines is due for an upgrade, I was interested in one of the contract deals you have through Hifi Corp, This is for the 1GB Anytime Data + Skyworth 75" UHD LED TV. Upon arriving at the store (Hifi Corp Festival Mall), i was told that the store was blocked from performing such upgrades, I was then referred to an MTN store or online, I called this morning and to customer care (135) and they are not able to assist, i was then transferred to Mondo who advised that they cannot pick this up on their system/catalogue. How do we go about this, which department can help on this. Please give me a ring ***)