Unacceptable customer service

I bought a laptop at Ackermans on the 5th of August 2020, after 2 months i started experiencing the laptop jamming and sometimes it was not switching on at all. I took it back to the store, as i was not having original receipt due to disaster management at my home i lost it.. I was advised by the shop to go to police station and write the affidavit, i did so. I brought affidavit back to the shop with the laptop.. Unfortunately after 2 months my laptop was back from the repairs and it was not repaired still reason being i didn't have original receipt.. Please help.