Makro cannot refund me but their device is faulty

I have been promised a refund by Makro because of a Tablet I bought from them which is constantly malfunctioning and I have returned it four(4) times for repairs and each time they bring it back there is never a job card, so I never ever knew what was fixed. I decided I did not want it any more and the staff s also mentioned that if product is repaired 3 times, then the customer is refunded and that is also Makro's return policy. I speak to different people everyday and I have to explain my case each time and worse, they made me speak to their client's staff, Lesego (SAMSUNG )who told me he does not know how he is going to explain this situation to his manager and that the device is not faulty and I must take it back. Makro staff are *********** and took me for a fool. I am very unhappy about this bad treatment and I would never buy any appliance from Macro. If Makro can't follow their policies then they would lose valuable customers.