I made a reservation with Rentalcars.com, at Athens airport, car provider company was Gold Car, (I made my booking at the very last minute prior to my departure). once I arrived at the terminal there were neither was an office nor reps. I asked the information desk how can I get them they said they had to give a name and contact number, where I didn't have it. I have found the Gold Cars number called 3 times waiting on the line for 20 minutes in total. So I tried to call Rentalcars number, the number on the voucher didn't work. On my IphoneX I have tried to use live chat, but it didn't work as well. Lastly, I sent them an email, where they sent the voucher, I replied that email, it doesn't says no-reply this email, Rentalcars.com. The email has not returned back which meant it went through to the right place. I was expecting them to call me but nothing has happened. I was stressed out 30 minutes at the airport with no support. I hired another car and tried to catch my meeting. Today I used their live chat on the computer, the rep hangs up the chat screen. I asked for a customer support number they just wrote 0333 003 5609 we supposed to know where this company has been based, and know the country code, even I asked for it, they didn't provide. Now they are saying that they cannot refund my money. I am stressed out, with no support, very BAD BAD experience. BEWARE from this company. If you come across a problem you will be alone, no support!!! Never ever again I am not going to use it.