MTN ARE ******** AND LIERS, DO NOT TRUST THESE *******

I upgraded in my contract in July when it ended. Took a sim only deal to give me R200 airtime for R139 a month. For July and August I got billed 200, when I enquired through calling 135, I was told I need to call mtn direct. I complained on this platform, they said they recertified it, only for them to charge me R174 monthly instead. I want wahhat I was promised when I was upgrading..that is R139 for R200 airtime. Each time I call mtn direct they say they can't help me because they only do sales. 135 say they can't do anything for me, I need to send them the contract, which is with mtn direct.Today a Sanele Mvubu I talked to literally dropped the pgone on me because he says there is nothing he can help me with. I am tired of this going back and forth...SORT IT OUT.