Still waiting

I went to Foschini on the Bluff to do a SIM swop last week Sunday at about 10 past 9 in the morning. After following up on Thursday why the new card is still not actived, I was promised feedback on Friday. Friday came and go. Saturday I phoned again, still not done. Asked that BM needs to follow up and give me feedback. Received call from Bernice, BM at about 13:00. Promised the problem will be sorted out by Sunday, exactly a week later, after I was told 72 hours. Guess what? It's 16:00 on Sunday and no SIM card and no phone call from Bernice. Now I wonder what is the problem, Manager not keeping to her promise, so how can I expect the staff to do it!! When will I ever have a working cellphone again??