faulty tablet under guarantee never repaired

On 10/07/2015 I bought a vodacom tablet from that store. All went well until 17/02/2015 when it started freezing, so I took it back as its still under guarantee.<br> Me and Charmaine filled in the relevant forms and she saw there's no marks or scratches on the device, <br> This week monday, I phoned them, they told me that Durban Hub didn't repair it because it was opened up by someone else. My wife got in contact with durban hub, and they told her the tablet was sent back to Empangeni in February already, but we must send it back to them for a second opinion. I went to the store today, and the manageres told me it was sent back to durban hub last week Wednesday. I requested she must phone them, she phoned someone and told me they will not repair it because there's physical damage on the tablet. I told her if that's the case then I want it back before 5 otherwise I'm taking legal action. I phoned dbn hub myself then and they told me my tablet wasn't sent back to them. Now all of a sudden the boss of the shop is bringing the tablet @ 14:00 back to the shop. <br> This is totally unacceptable. My tablet is still under guarantee and it was never opened up by someone else. They are robbing customer