Poor poor customer service

My name is Zama Nene. I bought a sinotec tablet at Game stores in Midlands mall on the 30 of march 2015. I paid for it cash . On april the 12th it stopped working and i couldn't return it on the same day as i work at Hlabisa which is 4 hours away from Durban. I returned it to Gateway game (24 April 2015) who took it and said i will have to wait for 22 working days. I waited and got an sms on the 22 of May 2015. I went to fetch it . When i arrived the tablet still had the same problem they asked me to wait and they took it to technicians who work inside the store who fixed it and gave it to me after an hour of waiting. I took it and on the 25th of May it stopped working and i had no phone to use. I traveled to Durban and on the 6th of June i went to return it when i arrived at game the one in town they said i should go to midlands mall (spoke to the manager n. mKHIZE I THINK). I went to Midlands where they said they cant give me my money back no give me another tablet. They took the tablet and said I have to wait for another 22 working days. I am so upset for the way they have treated me . The tablet gave fault in the 1st 30 days of purchase yet they still require me to wait