Vodacom cheating People

I bought a Samsung z4 flip contract about a month ago from Vodacom for my wife. She used the phone for a month and received a phone call. When she flipped the phone open to answer the screen turned all funny colors and went black. I took the phone back to Vodacom to repair it. I received a message stating that I need to call them for a quote. When I contacted, they said the repair cost is 9700 for a new screen.

The phone was never dropped or anything and they said I must phone the insurance . when I phoned them, they have a Nokia on the insurance and witch I never took a Nokia from them . we also registered for a free screen repair when we got the phone but now, they are not picking anything up on their system. I feel I should get a new phone as this is a fault from Samsung . there is also no evidence showing the phone fell. When the tech booked the phone in at Vodacom on the paper it shows non warranty but, on the box, it shows 24-month warranty.