Pathetic Cellc customer service

I had an upgrade done online in November, i received the phone and everything was well. On the 5th day of Having the phone I noticed the battery was just draining, i called the customer service and they advised that I return the phone because its still between the 7 days of returning the phone. The next day I called the repair center to book the phone in, the lady was absolutely unprofessional she took down my details and notified me that I'd get feedback, the next day still no feedback when i call back another lady says that theres nothing captured on their side, she then finds out from the lady who took my call why it wasnt captured and her stupid excuse was her system was faulty, finally after fussing and fighting i spoke to the manager and he helped me. The phone was fetched and taken to Johannesburg for assessment, i received an sms stating my phone is approved for OBF i need to contact the center for a new device. I have been phoning the call center since the 18th of December and till date no1 was able to assist me. It is absolutely ridiculous and pathetic for a call center to be so unprofessional and inefficient. No 1 in that call center was able to assist me with getting a new replacement phone which is absolutely frustrating. When i signed the contract it was between 2 partys cellc and myself, so now cellc is not able to keep up to their end of the contract because the contract im paying for is not only for the sim card but the phone as well, and cellc expects me to pay the full amount, absolutely ridiculous. I NEED ASSISTANCE AND FEEDBACK ASAP!!!!