Error - number of apartments

I have recently put one apartment for rent with 4 bedroom up to 8 people. Got my first booking yesterday and the person booked two apartments for 16 people for the same period. 

As i only have one apartment with 4 bedrooms I cant welcome 16 pax, please advise as I have sent email to booking but no reply so far. 

I must have some setting wrong or something. what to do and who to contact, 


thanks S

Bandara Hotels…

and in the meantime, I recommend you to stop sell on Booking.com until problem solve to avoid same case again.