I can't go live on Booking.com

I have a problem with cancellations and no-shows, how do I receive the money for those cancellations? I don't see the option to get that money back.

we have made a discount for effective payment and when we want to modify the rate it does not save the changes. How can we do the rate modification?

Hoy can I contact customer services for un invoice already paid and not recognized by Booking?