How can you charge my credit card two months before the stay?

Your card is charged when the booking is accepted by you and the sitter. You should contact Rover support but this is the way it works

You should call Rover at [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team] or use the Help link above to send the company a message.

This is board is primarily for sitters and pet owners. While some Rover staff do participate on the boards, it isn't an effective way to communicate with the company.