Claims of false dameged car invoices after 5 month

On the 05/09/2014 I hired a vehicle via an Insurance while my vehicle went on repairs.When upon receiving the vehicle the delivery man handed me the checklist and there was nothing noted on the form though the vehicle had paint damages.The damages were not huge but I was disappointed that I was the one who had to point them out to him. I even made a statement to him that upon collection if those damages are not reflecting on the card I will be made responsible to pay for them. When I returned the vehicle I was told about the front damage that they claim I have caused and I had no knowledge of what they were talking about and I called the Europa Head Office and tabled my case, I was referred to the branch again to deal with the matter.The vehicle was returned 29/02/2014 to me see the damage that they claim I caused. I then told the gentleman that I have no knowledge of the front scratches they are referring too.I stipulated that on the form and that was the last time I heard from them.Last week 26/02/2015 I was shocked to receive an invoice with attached pictures of the same car I hired now having front and back rear damages. Why 5 months delay if I damaged your vehicle? Blame Shift