******* MTN NEEDS TO REFUND ME!!!

On 14/02/2020 I did an online upgrade with mtn for +-R700 on the 27/02/2020 the device was delivered and I wasn't happy with the router I therefore returned it to MTN Menlyn to cancel the upgrade. I have about 4/5 mtn contracts I was originally paying R1750 in total, and R309 on the number which I did the online upgrade on. So my account should've only increased with +-R400 however my billing for this number alone was R1299. My upgrade was never cancelled I therefore called them last month to cancel it which was done however I've been ****** and they need to refund me. I did my upgrade on a different number that was also due since the online contract was never cancelled. The upgrade was for R599 however I'm being billed R999 for this number as well. I've always had the best experience with MTN but I'm completely dreading it I've found myself paying an extra R850-R950 per month. I've called the contact centers I cancelled the online contract however my billing still states R1299. Once I'm done with my contracts I'm cancelling every last one!!!! IM DONE WITH MTN!!!!!!! I've paid my contracts without fail for 8 years now