Damaged phone

I bought a Samsung A32 phone on the 19th of March 2021 which was only three weeks old and it stop working, it just switched off. I took back the phone to the store Samsung Mall of Africa on the 9th of April 2021 which was in the very same state as when I purchased it, no physical damage, screen not even a scratch, apparently I dropped the phone hence its off there's internal damage, how does a phone fall and get to have internal damage when it doesn't even have a physical damage. Mind you the phone had no screen protector or pouch, so how did it miraculously survive after the fall.

Samsung Mall of Africa failed to call me and tell me that after I took the phone back, I had to call the store after a week of no feedback. Their technician is giving me the run around, no one wants to speak to me. I don't have money to pay for repairs, more especially since I know I didn't damage the phone. I still have the receipts including the one when I took it in after the incident which also states there's no physical damage.

The management at the store don't have good customer service, they only assist when you buying but don't want to deal with problems. I was left hanging they didn't have the desency to tell me feedback from where they said they will take it, so they felt am stupid and dont know anything. I am very frustrated and have no solution, I feel like my rights are being violated.