Are there errors showing up on your event log? And what errors do show up in your event log?
Below some errors that I can think of:
Rebuild index forbidden indicates that your service name or admin key might be incorrect.
Another error I have walked into with Azure search is having equal fields in azure search with different search properties set. For example if you have two page types with the field 'Title' one with 'Retrievable', 'Searchable' and 'Facetable' and the other with only 'Retrievable' and 'Searchable' this error can show up. Maybe you have the field 'Title' on other page types with no search fields set?