Alex

Don't bother, it's a scam, unless you want to pay more than what you originally agreed.
As others have mentioned, they will find a reason to refuse the rental unless you pay extra.
I booked a cheap car through Booking.com, but on arrival at their counter I was asked for an extra €20/day, as none of the four different credit cards I had on me were embossed. They have a line in the terms and conditions saying they require an embossed credit card, which is a trap in the small print. Most banks don't even issue embossed cards anymore, so this requirement is nearly impossible to meet.
In my case the extra wasn't a huge amount, but I refused to encourage such practices, so I made alternative travel arrangements.

Good communication, very good service, fast delivery. Highly recommended.