Unfair treatment (2-year warranty)

I bought a Huawei Nova10 in November 2022 , the device suddenly malfunctioned in Dec 2023 and didnt switch on after my battery died despite numerous attempts. I got this on 3year contract under cellc and still have a full 2 years of paying for it. I contacted Huawei and was told it was still under the 2year Warranty and was told to bring it in at Cornubia branch in Durban which i did. When i got to Huawei they told me that my phone is out of warranty because it has a scratch at the back, not a crack but a scratch !!!! And that they will book it in for assessment but they will have to change the entire back cover and i would have to cover all costs of the repair( which i did not understand because that is not the issue. I have a malfunctioned device that needs more attention than that.. after battling with the consultants i eventually gave in , left the phone and asked them to assess the phone coz i did not understand what could have caused it to die on me in just a year of usage. They called that same afternoon. They advised that there was a malfunction of the main board and this was the cause of the device dying but over and above that they told me they also see another dent on the edge of the phone on the top right corner and that they will have to replace the whole LCD as well and i was Billed R8500 for everything. Can somebody tell me why and how i am forced to pay for replacement of things that are not even relevant to the cause of the damage to the phone??? Why offer a warranty and confirm a malfunction of a part on the phone but refuse to fix just that coz that is what i am entitled to ? Is this a way to exploit money of customers so u cover the costs that the "warranty" is meant to cover ?? I am extremely disappointed especially since i still have another 2full years paying for a dead phone. If that phone is out of warranty because of its scatch and that dent and I'm liable to pay for the fault myself , why do i not get to choose what i needs to be fixed on my phone ??? HUAWEI NEEDS TO FIX THEIR MALFUNCTIONED MAIN BOARD UNDER WARRANTY AND STOP MAKING EXCUSES NOT TO PROVIDE A SERVICE THEY CLAIM TO OFFER.

SOMEONE PLEASEEE HELP , MY ENTIRE LIFE IS ON THAT PHONE