Telkom Maponya Mall and the poor service

I took a contract with Telkom for 36 months the phone is a Z flip 5 it stopped charging 10 months after buying it. I took it to Telkom Maponya mall for repairs because it was still under warrantee. I was told that my phone is deemed out of warranty because of water damage and I must pay R13 000 which is crazy because I was very careful with the phone and I know that it could never be water damage. I declined the quote when they brought back my phone the screen was literally opened, so it was not properly closed I asked them to take it back for them to close my screen properly. After waiting for another month without my phone I received a SMS that my phone has been fixed and I should go collect it. I went back to the store took my phone plugged it in a wireless charger. My phone was charging however they broke my screen. When I switch my phone the screen is blank and my battery is now over heating. I am so ****ed to a point that I no longer want the phone Telkom Maponya Mall is not taking any accountability. Please can I get help in this matter because It is not fair that I pay every month for a phone that is not with me and when they return it it is broken still. I have 24 months left to pay for this phone that I am unable to use because of Telkom Maponya took my phone to people that are unprofessional and don't know what they are doing,