MTN Poor customer service

I upgraded my mtn Contract on the 6th December 2024, I checked my bill which is sent to the wrong email and I changed it via call centre and online but still it hasn't changed. My bill is for R1407.02 which is incorrect because the new package is upgraded to was cheaper R299, it was part of the black friday deals and the monthly installments should have decreased. I also have not received the device or any of the benefits that was part of the wifi package deal. The consultant captured my application but there was a problem which was escalated to the relevant department in head office for assistance with the error. I sent numerous emails to mtn's complaints, retentions and customer care department, up until now I have not received positive or any feedback except for a email to provide my email address from the complaints department to escalate the matter to retentions. Due to the lack of communication and feedback my lines are all cut and I am unable to use my phone to do anything, I require my phone and Internet connection for work purposes and this will greatly affect my work life. It would be appreciated if someone can give me some type of feedback or something as to the way forward. I would like to that Mr Anderson Moritz for his frienly service, brilliant customer service and for keeping my up to date with the matter.