Bad Service of MTN Vangate Mall

Hi there,I’m Mr.Bradley Dyson.I had two contracts with MTN,my contract amount was R1130 for both devices.I went into the MTN store,just to find out when I am due for an upgrade on both devices.I assisted by an Agent by the name of Warda.Warda told me in September when I wanted to settle the amount for the old devices it will be round about R6000,she then advised me to do the Upgrade after or on the 5th of October,and we will avoid devices,as well as tax etc.We did the upgrade as in my mind I thought we will only pay our old contract until Jan 2026,and in Jan our new upgrade will automatically start.Just to find out that I got a huge bill of R4700. I contacted the agent to ask,why is my bill this way,as she told me that I will pay the old contract till January and then my new contract will kick,I went back to the store and I was told that I must transfer my salary into another so I can just pay the old contract,and then I should pay it in store and after that I need to make arrangements,I called the store manager Portia,and I asked her advice about the whole issue,and was told Warda was day off,she will have a meeting with the agent the next day,and will definitely call me the next day,she never called me back,when I called the Manager didn’t want to come to the phone and said Warda to take my call.I am so disturbed about their service,With no answers to my situation I think this is very poor and bad service,I am stressed as I never had a budget for an amount of R4700.I am very very disappointed as even the Manager by the name of Portia never wanted to take my call.I wonder if this was just to make a sale.Why was 1 of my upgrades a normal upgrade on the system and the other upgrade showed an early upgrade,as both my first contracts,i took a day apart,what is my way forward,and i need a answer as soon as possible.I am seriously not satisfied.