Worst customer service

Hi FI Corporation Head office 07 July 2020 The Manager/CEO I am writing to you to file a complaint about the service that I received at your Springfield store. We visited your store which was still under renovation on the 2nd of July 2020. I purchased a 7inch tablet. Upon opening the box we found the unit not switching on. Lucky we opened the unit outside the store in the parking lot.I immediately went back to the salesman and showed him the unit Upon opening and testing 3 same cellular phone I was given one that came on. After checking the phone IMEI number at home and the box it did not match. However after using it overnight the phone went dead after a full charge.I went back to the Store and your very unhelpful Manager who was rude and did not really know anything about customer service reffered me bluntly to the service department. I received excellent service from them, without question I was given a replacement unit. The unit was marked R 1095.00 but I was charged R 1 400.00 . You manager just said (that was the old price, take it or leave it.) The fourth unit is also faulty as it gets very hot after using it for ten minutes. Furthermore, I can included in this letter some documents which will support the claim that I am making. In conclusion, I wish that this matter will be settled as everything that transpired has caused a great deal of stress and hassle on my part. I look forward to hearing from you regarding this matter soon. Dr Maharaj.