This is a regular verb. It follows the conjugation pattern of the verb falar.
Present:
A Ana reclama do barulho todas as noites.
Ana complains about the noise every night.
Preterite:
O Miguel reclamou do serviço no restaurante.
Miguel complained about the service at the restaurant.
Conditional:
A Clara reclamaria se o pedido estivesse errado.
Clara would complain if the order was wrong.