Selling Faulty Products

I bought a 40L Samsung microwave from your store, it was one month in use and it stopped working, i returned it and there was just no follow up about the progress of the repair, i had to phone every day to find out what was going on, poor feedback to customer, when i received the microwave back it was badly damaged! I bought a Dell tablet from a salesman and he promised me that it had all the functions i need, wrong it coun't do any of it, so salespersons at Makro is unexperience to sell and just want to make a sale! Makro has once again sold me a faulty product because it is not working properly