Terrible service

I had the most terrible, unprofessional customer service with cell c lebowakgomo branch, with consultant Rebecca. I went two weeks back to upgrade, from 15 gig to 30, but now my data has reduced to 10 and I am unable to work, not to mention amount of money I used to travel, she promised to make a follow up and come back to me but it has been over 24 hrs , I even called back to make a follow up with silk but am still waiting.