Evri complaint: EBay goods for delivery

I had a large framed, signed shirt picked up from my location in Sl postcode on the 29th May 2024.
I paid extra for insurance and delivery was expected within 3-5 days.
The customer contacted me saying that they can’t find the address and so gave me a new address. I forwarded this onto EVRI ( one of many messages left on the customer service automated line). No one came back to at any time.
As time went on the client became increasingly frustrated as to no progress with delivery. I contacted EVRI again and again but no response or contact back.
We are now at 26/6/24 and I STILL have had no contact as to where the goods are.????
I find it absolutely incredible that a company as large and responsible as this clearly feel that it’s customers are 3rd or 4th class.
I’m at my wits end and have not made any progress.
Please help.
Thank you.