********** contract upgrade

On the 8th March I received Sms's on my phone stating that I have successfully upgraded my contract. I had already upgraded my contract in November 2021. I called Mtn to report this and the consultant advised me to send an affidavit. I sent the affidavit on the 10th, when I followed up on the 11th, I was told no documents were received and I should send them again. I called again on the 15th, I was told that ***** department closed the case cause there were no supporting documents. I resent them and copied mtn complaints department. Still nothing happened. I even sent a message on Mtn Facebook page, they also asked for proof, which I mailed the Sms's and the affidavit on the email address they gave me. No feedback,no assistance. I requested my statement and noticed that there was a change. An increase of R500 on my monthly bill. I called on the 22nd. The consultant still stated that she's sending an escalation, she toldmeto follow-upin 2 days. My account was debited R1700 instead of R1200. I called again today, Asanda told me that the issue was only escalated on the 22nd of March and ***** department will take 21days to revert. I requested to speak to someone senior. She told me that she'll send a mail and I have to wait for their response. I am really frustrated and would appreciate this to be resolved and part ways with this company. Worst experience