Poor rental experience

Terrible service, they would not answer the telephone, I tried to call them for an hour (and yes at the right number). The first car they offered was a disaster, not safe for the road so I did not accept it. The second car was safe but full of damage and very dirty on the inside. It took me an hour to clean it. They would not let me rent the vehicle without purchasing additional insurance even though the car was fully insured as I did not have a credit card.