Further assessment investigation

I have been with Cell c for the past 3 to 4 years .I took out a contract with on them the 15th of October 2021 in fact it was an upgrade .I used to have the Huawei P30 lite which was also a contract phone with them and i upgraded to Samsung Galaxy Flip3.On the 9th of this month as i was folding my phone it cracked and my screen went black i looked on the screen and i saw a cracked inside the folding part of the phone as i looked further i saw that the screen popped out on the side as well .I was puzzled because the phone did no fall or anything i took the phone in for repairs at Cell C store somerset west on the 13th the phone was booked in for repairs or replacement depending on the outcome of the assessment .I phoned the 24th for an update and i was informed the repairs department indicates I'm at fault the device is broken because of physical damage .I was given numbers I must dial for further info upon request .Today i called and the repairs department and according to the assessment states it was physical damage and thats it .My question is why must i claim from my insurance for something i know i did not break and why was the assessment done so quick ,was it done properly ?because the report states that the device was booked in the 20th for it to be assessed and outcome was out same day as if they just assumed by looking at the device or perhaps all screen /Lcd cases are physical damage .There is no indication what steps were followed in assessing the device according to me this is day light ******* and a job not done properly .I feel that the technicians at Cell C are robbing their customers by doing a half job.I even had people the house who witnessed how the device went all black after folding .I refuse to continue paying for a device i did not break i would not have went to the store if i knew i'm at fault i would have taken my device straight to samsung stores.I demand a further and proper assessment and some professionalism from the consults for Gods sake they can be so unprofessional over the phone ,not mentioning how many times i got disconnected after dialing 084135 a thousand times POOR SERVICE. CELL C is greedy they do not have the best interest of the client at heart .