GFS express Worst customer services and always a delay with delivery

Here’s a more polished, firm version of your complaint that still keeps your frustration clear but sounds professional and impactful:

GFS has some of the worst customer service I have experienced.

My Temu parcel could not be delivered last week because I was unable to provide the courier with an OTP. The delivery was then rescheduled for after the Easter holidays. I contacted your offices and was advised that an OTP would be sent to me shortly. However, to this very minute, I am still waiting.

As a result, the courier will once again be unable to complete the delivery due to the lack of an OTP. This ongoing issue is extremely frustrating and completely avoidable.

In addition, your telephone service is very poor — it is difficult to hear or understand the consultants. Attempting to make contact via email has been equally disappointing, as no responses are received.

This level of service is unacceptable.