Poor service MTN BUSINESS

On my quest to get a new phone I encountered numerous customer care support from various organizations with bad service . Today it’s MTN . I am a customer to MTN since 1998 and have never experienced poor service until this year . I send through my upgrade documents to mtn business last week , I am still waiting for feedback . Consultant promised to get back to me last Friday and did not , today when I emailed her , she claimed my upgrade was part of a system error which they trying to resolve . She knew I needed a phone urgently but failed to give me these details last Friday when I could have proceeded to cancel the upgrade process and just buy a device . When I called in to speak to supervisor, I was told they would transfer me back to the same consultant. When I refused and insisted on a supervisor, I was placed on hold and left in there until I hung up . Punished for not tolerating the bad service dished out by MTN BUSINESS