Dear Customer Service Team, 

I recently used your product delivery app and had an issue with it that I wanted to report. When I placed my order, the estimated delivery time was 2 hours, but the product did not arrive until 4 hours later. I understand that there could have been delays due to external factors, but I wanted to make you aware of the issue. 

I also wanted to note that the product itself was of excellent quality and I am very pleased with it. However, I believe it is important to stay true to our delivery estimations so as to ensure customer satisfaction.

Thank you for your help and for taking my feedback into consideration. I look forward to using your app again in the future.

Sincerely, 
[Name]
Un utente ha avuto problemi con la consegna del prodotto.
Genera un'e-mail al team del servizio clienti di un'app di distribuzione del prodotto che delinea un problema relativo all'esperienza utente.