Incorrect Upgrade - Not all Data Received

I have done an upgrade via the call center on the 26/09/2023. I didn't receive all my data that was on the special on the MTN App. The store advised that special on the App, can only be done via the call center. When I called the Call Center, no1 can assist and help me. I requested to Cancel my upgrade and I will upgrade once I find another deal. They can still help me. I have emailed, still no response. Reference number: ***a-***f-***c9, Call reference***. Last agent I spoke to was Stella from BPO call center in Cape Town, she was very Rude and Arrogant, more interested in laughing and talking to her friends. She gave me incorrect information. I would like the staff that is directly working at MTN and not outsourced company to assist me. Please can you reverse my upgrade, I will select a new upgrade OR give me the correct upgrade that i have selected via the MTN App.