Okay, either Holiday Autos or OK Rent a Car omitted one important contract condition to be displayed on Holiday Autos web site. Then I came to the rental desk and learnt this new condition costing, in my case, 300+EUR. Holiday Autos' operator suggested to pay and then ask for reimbursment from them, upon terminating the rental. Why not trying to seetle this easy task before I returned the car (still 13 days left ahead), I don't know. I paid, then eventually was offerered to be compensated in my local currency. By that time I have already lost some 10+EUR because of my bank's conversion fees but I agreed. The reimbursment however was expectedly paid in another currency and I lost 10+EUR more (overall some 26 EUR). I pointed out this inconvenience to Holiday Autos, which had been caused entirely by their laches, reminded a few times, called them and was promised to have it handled but then... 3 weeks passed without any apparent sign of interest in my case.