@Irina222 I can't imagine that Airbnb deactivated your account because you didn't follow through on an Inquiry.
I assume you understand the difference between sending an Inquiry and sending a Booking Request? If you just want to ask questions, send an Inquiry, if you want to Book, send a Booking Request.
The only thing I can think of is that you sent a booking request, the host approved it, and when Airbnb went to take money from your account for the booking (which will happen if you sent a Request rather than an Inquiry and the host accepted it), the transaction failed. That would cause them to deactivate your account, as your form of payment didn't work.
You need to contact Airbnb directly to find out exactly what is going on.