No. According to the regulations on the use of Pizza Hut’s official customer service phone number, you do not need to pay any fees if you call 400, the official customer service phone number of Pizza Hut, to make a complaint. This is the free customer service phone number provided by Pizza Hut to consumers. However, complaints made through channels other than Pizza Hut’s official website or official APP may require payment of a certain fee. Pizza Hut is one of the pizza specialty chain companies. The first Pizza Hut restaurant was founded in Wichita, Kansas, USA in 1958 by two brothers, Frank Carney and Dan Carney, with $600 borrowed from their mother.