Absolute horrific service

Been struggling for weeks to get assistance after receiving a faulty device after renewing my contract. No assistance in the call centre, hold on, transfer here, transfer there but don't get anywhere. Received this sms 15 August and that's as far as communication goes from their side: Dear valued Cell C Customer, The assessment on your device has been completed and has been approved as an OBF. Please contact or visit your point of booking for a replacement. Your reference number is CCD447468. Numerous case Cell C Customer Service Case Number : ***, ***, Cell C Customer Service Case Number : *** Cell C Customer Service Case Number : *** Cell C Customer Service Case Number : *** Cell C Customer Service Case Number : *** Cell C Customer Service Case Number : ***. Spoke to Mamosa in the customer care department, refuses to put my call through to a supervisor or manager. Really disgusted with their absolute lack of service and customer engagement.