Incompetence

A month ago I booked my phone in for repairs at Cell c Alberton. On the 3/9/15 I received the message saying that my phone is ready for collection. I went to collect it on the 9/9/15, only to find that the sim card holder was missing. Mareece at Alberton branch phoned the repair centre and she was told that sim card holder will be at the branch on 11/9/15. I went there on 12/9/15 and it was not there. On 14/9/15 (9h48) I called 140 and spoke to Retshidisitswe, she told me that she is not dealing with the queries ( bad attitude). Around 15h00 I spoke to Babalwa on 140 she transfered me to Matthew at repair centre and he said I must phone Alberton again to fiind out. I then phoned Mareece at Alberton. She said she phoned repair centre and they promised to get back to her which they never did. She tried to phone them again, but they did not answer their phone. And this was the fourth time I sent my phone(same Lumia 1020) for repairs with same problem. My problem i,s Im paying for they phone which I am not enjoying the benefits of it. Plaese help me.