Bookings

The best way to remove other providers booking services is to contact the provider directly. Failing that you can submit an opt-out request to the Google Business Profile support team by clicking this link https://support.google.com/business/gethelp

Online Ordering

Like bookings, the best way to remove other providers booking services is to contact the provider directly. Failing that you can submit an opt-out request to the Google Business Profile support team by clicking this link https://support.google.com/business/contact/business_food

(Note the above online ordering link can be used to opt back into your ordering provider) 

Otherwise, this should be easy once you log into your Business Page.

Once logged in, select the relevant service