Bad service from Cell C

I purchased a phone from Cell C in April and in July 2015, my phone went in for repairs for not charging at Blue route Store. After 3 weeks I was told to collect the device with a reference number which I did however the device could not be found. after backing and forthing to the store with different excuses , it was discovered that the device was handed to another customer. After one week of trying to get the phone back from her, there was a problem as the battery wasn't with the phone and it was an issue with the EMEI no which needed to be swopped. I have the phone with me now but have not been able to use it or receive or make calls since it is blocked and cant get through to the branch. I am a pensioner and have just had a back operation , I cannot be bulldozed by this company any longer, I have tried to contact a regional or area manager but I get blocked by the Call Centre. I need to express my utter disgust in the way this matter has been handled since I have been a Cell C Customer for years. I am demanding to either have this device replaced and to be contacted by manager or higher level who is capable of handling this matter professionally. From Maureen Adams