Complaining is a language function.
Lexical chunks for this are:
- "I'd like to complain about [NP]"
- "I'd like to make a complaint about [NP]".
- "I'd like to speak to the manager". Stronger: "I demand to speak to the manager!"
Effective complaining requires much more than just language. You need to talk to the right person, give the right information and demand a solution that is satisfying.