If you have your owner’s papers, there should be a phone and online Whirlpool site for support. There may be a parts diagram on paper or Whirlpool online to search for parts. Swinging the door without stopping it may have broken a plastic pin meant to serve as a hinge instead of a metal pin. Whirlpool parts diagrams can help pin point which parts to replace. If Whirlpool doesn’t supply parts then searching for repair and distributors of parts would be the next step. Last is calling in a Whirlpool service repairman.