We thank you for flagging the problem and apologise for the inconvenience.
'Inconveniente' = in-con-ve-NYEN-te; stress on the fourth syllable.
Use as the opening line of a response to a client complaint, before explaining the solution.
Thanking a complaining client before apologising is a classic customer service technique. It reframes the complaint as useful feedback. 'Ci scusiamo' (we apologise) takes collective responsibility without admitting specific fault, which is important for legal reasons.
Siamo spiacenti per il disagio causato.
We are sorry for the inconvenience caused.
'Disagio' is softer than 'inconveniente'
Prendiamo atto del suo reclamo e stiamo indagando.
We acknowledge your complaint and are investigating.
More formal; 'prendiamo atto' = we take note/acknowledge
Ci scusiamo sinceramente per quanto accaduto.
We sincerely apologise for what happened.
'Sinceramente' adds genuineness; use when the error is clearly the company's fault
Italian consumer protection laws (Codice del Consumo) give customers strong rights, including a two-year guarantee on products. Handling complaints promptly and in writing protects the company legally and maintains reputation.