Bad service and damaged goods

I am writing to make claims to damages made by one of your franchises located in Brackenfel Cape Town, next to the Hypermarket, i took my car there in October 2017 to fix my starter which they replaced but in return damaged my speedometer sensor . I went back to complain about it but they claimed it wasn't their responsibility, treated me like i was nothing, owner was very rude, eventually repaired it myself which cost me a lot and the receipts I still have . I took the car to a local mechanic and he confirmed that sensor was broken when starter was replaced, because the person who did it wasn’t qualified to do so, few days after that, my car suddenly acted up and didn’t wanted to start, immobilizer light on, so again took my car to Reeds in City centre, they confirmed that the transponder was damaged when the starter was replaced, so after paying 3000 for starter to be replaced, it costed me an extra few thousand to sort out the rest, i will never in my life recommend any person to use kwik fit, staff *********** and management rude as hell