Disappointed

The service from absa is disappointing to say the least, I registered my claim 2024 December they dragged until April to resolve my access and thier disclaimer says they have fixed access. Took in my car for repairs at auto magic and this thing of photo evaluation they missed my mirror and seatbeat it's no longer slotting back in. Got car hire from avis via RSI as part of my deal I signed for 30days hire I followed up with the repeater last communication was my car was in painting. Easter long weekend approaching went home was smsed to return the car 17th before 5pm or ill be liable for costs called RSI and explained I went home they advised I call my insurance which I did and they drop calls after holding for over 30min, write them email no one gets back to me. How do I cancel this