I want to be a booking.com partner!

My name is Thiago Neves I worked 10 years in Hotels and I have always been in the hotel business.I currently have a taxi service company.  new cars and excellent service!  I recently signed up to provide taxi services on booking.com but haven't heard back.  when I finished registering, only a message appeared saying that they would contact me soon!  But it's been several weeks and I haven't even received a response!  I would like to ask for advice from those who already have experience in providing taxi services to booking.com, what are the next steps?  Do I have to wait or try to contact booking?