Pathetic Service on a TAB 4

So, I made the jump from Apple to Samsung! BIGGEST MISTAKE EVER! I got the lastest Samsung Tablet 4. I had it for 3 weeks and the unit was faulty. Took the unit to Samsung The Grove Mall and they agreed that this was a faulty unit and would be swopped out and I would have my new unit in a week. It is now a month down the line and still not one single person can give me an update as to when I am getting my replacement. Also when taking out the new contract with Vodacom on this unit I was promised the pen and Keyboard .... I got the pen, they said they would follow up on the keyboard and now that particular store has closed! The person who made me this promise was the samsung "expert". I have tried calling the person assisting me this morning 3 times with no luck! I should rather have stuck to Apple! Also i put on a decent screen protector and when i asked them if they where going to refund me for that as it was at my expense to protect the unit - the answer was NO! According to the Customer Service there are only 48 units in South Africa! So was i the lucky winner of the dud? And how can such a big company not have any in stock anywhere to replace my broken one! So now im stuck paying a monthly bill and insurance on a unit i have owned for 3 weeks!! SHOCKING