Bad service and no guarantee on repair

My wife bought a Starkey hearing aid from Hearcare plus in Mulbarton in 2022. She dropped the hearing aid in September 2024 and we took it back to Hearcare plus and they sent it to the agent to be repaired. We claimed from the medical aid for the repair which was 3 or 4 thousand Rands. We received it back in September 2024 and it was working. In December 2024 the hearing aid came apart but was not dropped this time so we handed it in to them, at which point it was still working but the cover was loose. We were then quoted R1270 for the repair and told that they had submitted it to the medical aid but the medical aid does not pay for repairs which is strange because they paid for the last repair. I feel that firstly the hearing aid should have been repaired under guarantee of the last repair. Secondly their submission to the medical aid was just an E Mail with my wife's name and a comment that it needs to be repaired with no code or anything else. My name is Gary Wilder and my contact number is 0744731319 or E Mail address gary.wilder20@gmail.com