Europcar Never Again

Rented a car from Europcar 18/04/2016 Cpt airport. Three weeks after return Europcar phones and tell me there is damage to the front of car very unspecific. Luckily I kept my Veh Quality Chec form on which I had marked additional damage and had the clerk sign next to it. Emailed my Quality check form to lady at Europcar and she informs me on telephone that all is sorted, it was clearly pre-existing damage. TWO YEARS LATER on 23/05/2018 I get a call from Wendy at Hybrid Collections informing me that there is an outstanding invoice from Europcar for R7350-00 for damage to the veh rented in 2016. Took a day off went through my archives and found my old Qualty Chec form and mailed it to Hybrid Collections. Now unable to get a reply from Hybrid collections. My email and telephone has not changed in the last 5 years. Beware of this company.