Repair to tablet in warranty

I handed my Lenovo tablet in at the Paarl branch because it did not read its sim card and thus I had no internet connection. They took six weeks to repair the problem. I received it back on a Friday afternoon and only had a chance to test it on the Saturday. When I tested it I found that the right speaker wasn't working and that there was a distortion on the left speaker in such a manner that the audio was hard to understand and there was a white frame around the outside of the screen. Please note that there was nothing wrong with this previously. I took it back to them on the Monday as they close early on a Saturday. I handed it in to a Fredalien who informed me that she cannot give me a receipt as their system was down. I also asked her for contact numbers as they do not answer their phone on the number that is supp**** on their website. She supp**** the following numbers to me *** as well as their mail address \***. Now after nearly 7 weeks I still do not have my tablet. I contacted them this morning and was informed there is nothing they can do for me as it was sent away. It is now nearly 13 weeks that I am waiting"