Worst Service ever: Rude Owner

On 2nd March 2020, I went to a Cellphone surgeon at Tablebay mall to fix my iPhone XR screen since they gave the best quote and offered the best service at the time. Two months later my screen started to glitch and I went back to them since I have received a 1-year warranty on the screen/LCD. So today I went back to them to get it sorted and received thee most despicable service from the owner one can imagine. The receptionist assisted me and contacted the owner, if my screen can be fixed under my warranty, and sent images of my receipts and images of my screen to the owner. He refused to have them fix my phone and started to swear at his employees and said its not his problem and they messed up. I asked if I could speak to the owner and he refused to speak to me over the phone. He arranged a meeting with me in an hour and he will asses the phone himself. He wasted my time as I remained in the mall for an hour for our meeting. I went back to the store to have the meeting and he refused once again to see me and said he is not coming. Extremely unprofessional, his employee cried in front of me due to the distress he has caused her and made her feel as if my screen problem was her fault which is also unprofessional. He then said he cannot help me to fix my phone and only give me 20% off if I get the screen fixed again by them and pay again to have it repaired. I paid R4000 to have my screen repaired initially and he expects me to pay to have it repaired again even though I returned it within the warranty period.