Uns****ed sales agents, unprofessional after-sales service. STAY AWAY!!!

So I took out a contract from MTN on Black Friday through this call centre and...well from start this was a mess. The sales consultant never added the cellphone I chose to the contract and only a simcard was delivered. The sales manager, Samantha, tried to assist but couldn't offer any solution with me having to take out another contract through them... I gave up and just bought my own phone. At least my premium is being reduced by R 200 pm right? My new premium is supposed to be R 499 pm.. My first bill was R 1209 and the subsequent one was R 699. I phoned MTN who confirmed that I have a R 699.00 pm contract. The person that sold this to me is not being held accountable and I am being given the runaround all over again. Ive almost spent as many minutes phoning CCI as the amount of cash that I have lost. I will never trust a call centre again. Though some managers and consultants have tried to save the situation, I have been worse of doing business through them. I reiterate, never do business through call centre, their sales people are target driven only and highly uns****ed in everything else.