Disgusting service from MTN

Good Morning

I am disgusted with the service received from MTN. I have been a loyal client for the last 28 years. They did an early upgrade for my data contract without informing me that an early upgrade fee of R1400 will be charged. They then debited my account for this R1400 extra on 25th June 2025. I have been calling them to assist me with my refund of R1400 as I did not agree to this early upgrade done via their third party provider ISON.

Every agent I have spoken to has promised to send an email to retentions and get ISON to call me back which nobody has done.

I want my R1400 to be refunded to me asap or I will seek legal help charging MTN for ***** as this money was taken out of my account without my approval.