You can 'block' people from sending you emails and bookings from your Emails page.
Open an email from the person you wish to block click on the 3 dots and you will see a 'Block Sender' button.
People in your block list will still be able to email you but their emails will be automatically deleted and not shown to you.
If you wish to block booking requests, (Escort, Webcam & Phone Chat), you may do so from the 'Blocked Senders' tab of your Emails page. There is a tick box next to each blocked sender that you can tick to have bookings from these people deleted too.