Serbia and Bosnia

I was in Serbia last year..İt s amazing beautifull country and nice people...By the way I ll tell u my experience on Avis Office in Nicola Tesla Airport.I rent eco car over internet for 112 Euro which was fully paid.İt was fully paid therefore I never tought there was a game or hidden cost.They asked me sign on computer screen to get the car.I didnt see any papers..I never ask them extra insurance or what ever.But when I returned my country they withdrawed 500 euro from my card.They took my signature from computer and prepared fake bills which includes 5-6 different extra services which I never asked them..Pls never Rent a Car in Nicola Tesla Avis office.This is real thing happened me...I called them and asked they said " this cost comes from winter tires insurance,IT SERVİCE?SWDS service ?Bla bla bla....Car rent 112 USD ,winter tires and other extra things cost me 500 Euro even I never asked them ..İf u go there never use Nicola Tesla Airport Avis Office,they cheat the people...