Disappointing service

I'm very disappointed in Admin Plus Insurance. I booked my phone in for repairs December 2023 and on the 23rd of January I was called by the Telkom store to collect my device. I collected my device but when I arrived at home to check it out the phone gave problems like switching off by itself, frees on a black screen, completely shut down then I can't turn It on for several minutes. So on the 26th of January I took it back to the store so that they can book it in again. I even called Admin Plus to notify them about the issue and they told me that I would not have to pay another excess fee. But on the 15th of February they sent me an email saying that I have to pay an excess fee of R619 and a penalty fee of R1238. The penalty fee is for having a second claim within 12 months. I did reply saying that I received a damaged phone but they contacted the repair centre who then sent them a report stating that the phone has a dent on the bottom right corner thus warranty is void. I feel like I have been ******. So I cancelled the claim because I refuse to pay for problems I did not create and now they sent my damaged phone back saying that my insurance policy is being cancelled.