Incorrect contract

I Recently upgraded my existing contract telephonically. I confirmed on the call that the package is the same as my existing package. The package has been downgraded (minutes and data). I called MTN customer care who promised they will call me back. I have sent. Since the 8th of March I have been sending weekly mails to follow up on my contract to the complaints email adress. I have asked for the recording. They have not rep**** once and have no alternative then to issue a complaint.