AVIS IS A *****ULENT COMPANY

My insurance booked a car at the end of March for me while mine was being accessed due to an accident. I had the rental for 23 days. My insurance paid for those days. I had the rental washed and filled before I returned it mid April. When I returned it the fender by the left wheel had been unclipped which I'm assuming happened at the car wash. I clipped the fender back in and there was no other issues with the rental other than a small chip on the lower area of the bumper which was most likely cause by a stone. I wrote on the return document that the carwash unclipped the fender and I clipped it back in so there was no actual damage on the car. They woman said it's fine, no photos were taken as evidence. I have not recived any updated invoice from Avis regarding any outstanding amounts after the insurance settled with them. I have now recived a sms that they have handed me over to the creditbeuro for R4709.58 and that to remove the listing I must make an immediate payment. I do not know were the amount comes from as there was honestly nothing other than a small chip of paint off the lower bumper. The rental already had several scratches amd small dents in when collected which they did take photos of. It's been 4 months with no communication from them and now this. I'm disgusted that they have the audacity to send me an sms with no proof of anything or what the amount is for.