Really poor service & misleading company

I was contacted on the 12th May 2026 by an agent who was offering data upgrade for my current contract. On point of say there was no explanation or clarity on what would happen with my current contract as she has said the only thing I’m changing is Data and it seem like everything else would not change. I was then charged a way higher amount then what was discussed despite eve no the MTN app showing the correct amount that should be deducted. I have tried multiple times to contact the company including calling MTN directly and the agent from MTN putting me through to that number it just rang multiple times and no answer. I have contacted MTN several times and was giving a case no: BO*** on the 3rd July 2026. I then made contact again on the 9th July 2026 and discovered that the case was closed without the matter being resolve or feedback being given. Another case was logged on the 9th July 2026 and Call Force sent an email saying they can’t get a hold of me. I have give them 2 number and have received no miss calls but somehow I was not available. I’m still yet to receive the phone call to resolve this matter. I need this contact cancelled and my money refunded back.