Evri complaint: Missing parcel

On the 18th of October I sent two parcels containing personal items from Sheffield back to my house in Arles, France. One parcel arrived, one parcel didn’t. When I looked at the delivery slip, the lady in the post office had not filled in my details correctly and the street was missing. There was a correct return address and she had also made me fill out a label with the correct address on it. The parcel that arrived arrived on the 30th of October. Since then I have been trying to find the other parcel. I cannot get hold of anybody. I have been round and round in circles with the chat and the Customer Services line which is quite frankly a sham. It tells me my parcel that is missing was returned on the 21st of November. And then gives me no further options to talk to someone to explain that it hasn’t been delivered. Thus is the reference of the parcel
H04G0C0001389734