Pay for what you don't get

Worst service ever. Abusive relationship. I was offered 2gigs by Zama from cancelation. Last month I was loaded with airtime and told to buy the data myself. DEC again I'm not given what's due to me. I called, transferred from 1 person to the next. Supervisor always in a meeting and never calls back. I spend over an hr on the phone with vodacom. The only thing they'll do is SAY 'we apologize for the inconvenience' then nothing. If i don't pay (rightfully so cause I'm not getting what I'm paying) I'll get blacklisted right? Why don't you take a sorry as well but expect us to tolerate the worst service ever. I have to stick with you for the next 22 months or so dedicating 2hrs every month to practically beg you to service me and grant me what I pay for.