No Service/Feedback for over 6 months!!!

My boyfriend bought me a tablet at the Greenstone branch for Christmas. I had to take the tablet on display as there was no stock left. We realized that the sim card reader was faulty after I took out a contract at another branch to use on my new tablet for Internet. We took the tablet in as soon as we realized this in March'15. They told me that it will take 2 weeks max to repair. We agreed to this. After 3 weeks we went back to collect the tablet as no one called me in the 3 weeks time with no feedback of what is going on and no one was answering the phones. They told us that the tablet isn't ready and that we can come collect it the next Wednesday, they will call me. We went back the next Saturday as no one called me again. They then told us again that the tablet isn't ready and that they will call us when it is. So we waited for their response as we don't have time to go every weekend to hear if the tablet is there. They called me 3 weeks ago to let me know that no one reported the problem and that they are going to send it to repairs only then (5 months later). It is almost 6 months and haven't received anything! By the time I get my tablet it will be outdated & useless!