Shocking

I bought a bmw i8 year ago , I don’t normally drive it because I have other cars, shocking enough I realized the hoot for the car was not working, I took it to Bmw sandton they kept the car for almost 3 weeks while waiting for the parts, they brought my car back I did not drive it I parked the car and went to USA, on my arrival I realized the car couldn’t not start I phoned bmw assist who told me the battery was faulty, after my car was towed to bmw sandton we received a call that the terminals were damaged apparently because the rat ate the certain terminals , I don’t stay in a place with rats thus truly an insult, I need an explanation were did they keep my car the time they were waiting for the part , secondly they told me the motor plan does not cover that , now I’m expected to pay 9000 rands in which I don’t know for what, this is day light ******* , they must take full responsibility of what happened to my car the time they were waiting for the parts and stop shifting the blame. I was told the manager said he does want to entertain me, truly is this the way of handling clients, can someone explain to me what happened to my terminals before I seek legal help