Cheap but a rust bucket of a vehicle

The car I rented outside was not clean and had many damage when I picked up was cold weather, strong wind and snowing hardly ( I had just arrived Iceland). They had 2 customers in hurry so I could not check anything and I didn’t got GPS that I requested on email I thought it should be prepared for me in car already and they went away from office already too I asked them when I returned car they said I should told before pick up car!!! I sure I didn’t made car new damage if they will not charge me after they may me fair car and fair care.