Carwiz Rent a Car ALBANIA

We have been there last July (2019) and rented a Skoda Fabia. Positiv: The Car was good - only a few months old - perfect for our trip through Albania. The staff was quite nice. When returning the car they even drove us over to the nearby airport. Negativ: We rented the caronline via a online carrental platform and also bought a full comprehensive insurance. When picking up the car it was told us that Carwiz would not accept the online full comprehensive insurance and in case we do not want to buy the insurance provided by Carwiz we would have to pay a 400€ deposit for the car. As we allready had the full comprehensive insurance from the online platform we did not want to buy another one. So we agreed in leaving the 400€ deposit. It was only possible to pay it with credit card, not in cash or so. When we tried to pay with my credit card (VISA Gold from Austrian Bank) it was not possible to pay the deposit. So we tried my friends credit card (Master Card from another Austrian Bank) it was also not possible. We phoned our banks and credit card companies, mine and hers ... all told us that the problem was the machine used by Carwiz. In the end we had to pay the full coprehensive provided by Carwiz. Strange because in this moment our credit card worked on their machine... This made the car by far more expensive than the price provided online and we had 2 full comprehensive insurances while only needing one... NEVER AGAIN