MTN POOR SERVICE and LACK OF CUSTOMER CARE

I have been trying to migrate MYHOME LTE account to a higher speed,10mbps to 65mbps for the last week.I have sent emails and MTN has requested info which I have given and have been told to contact their 135 help line which I have done and have been passed pillar to post and being cut off continuously after spedining 10-15 minutes a call getting nowhere.I have now got through to a customer care assistant who has promised that a sales associate will contact me within the next 24-48hrs.All I wish to do is give MTN extra business and because of a poor and clunky customer interface are determined to try and frustrate my desire and generate my bad will.Come on MTN wake up,you need your customers or dont you?