SELECT email_address ,  phone_number FROM customers WHERE customer_id NOT IN (SELECT customer_id FROM complaints)
Find the email and phone number of the customers who have never filed a complaint before.
[Schema (values) (types)]: | customer_complaints |  Staff : staff_id (text) , gender (number) , first_name (text) , last_name (text) , email_address (text) , phone_number (text) | Customers : customer_id (text) , customer_type_code (number) , address_line_1 (text) , address_line_2 (text) , town_city (text) , state (text) , email_address (text) , phone_number (number) | Products : product_id (text) , parent_product_id (number) , product_category_code (text) , date_product_first_available (text) , date_product_discontinued (text) , product_name (text) , product_description (text) , product_price (number) | Complaints : complaint_id (text) , product_id (number) , customer_id (text) , complaint_outcome_code (text) , complaint_status_code (text) , complaint_type_code (text) , date_complaint_raised (text) , date_complaint_closed (number) , staff_id (text);