Cancellation

I just joined Booking.com and did not had time to update the calendar.

I am overbooked in july, august and september.

I have tried to contact you and the client but no reply.

I sent this message to the client:

I am deeply sorry. The apartment is not available in July, August an September.
Please cancel the booking.
I just put it on booking.com and forgot to mark the months July, August and September as unavailable.
Kind regards
Stein O. Nielsen