Game store being inconvenient and not working regarding the warranty.

Earlier last year I purchased a phone, Samsung Galaxy A20 from Game store in Welkom. I went about 8 months using the phone and the warranty of it was 1 year warranty. Around 2nd week of November, the phone's screen went blank as in black but the phone would still vibrate and I would answer calls through headphones because I couldn't see what was happening on the screen. First thing the following day, I went to Game to return the phone for getting a new one because clearly there was a problem with it. I was told to wait for 21 days, of which I really did and even went passed the 21 days they said I should wait because the phone would be going to assessment thing. To actually show how inconvenient they are, they didn't call me when the phone got back to their store, I personally asked my aunt to go there and ask what was happening with the phone because i was out of town for the holidays. They then called me after my aunt went there to tell me that my phone's screen is cracked from the inside and to fix it is about R2500-and something & honestly speaking that's technically like buying a new phone. They AGAIN told me that I should pay R200- and something for them assessing the phone. I would really like to be assisted regarding this.