Fedex — Not delivering my shipment with AWB[protected]

Hi,
I had an international shipment coming in with tracking id[protected]. First they reached out to me saying only 1 box had come so I waited for the second box. Post that we agreed on the assessment value given to us and from then on they have stopped replying saying there is some technical issue.
I have emailed them almost 10 to 15 times and they are not helping at all. I have emailed them reg our concern and also whenever we call the customer care and share our tracking id they cut our call.
My sender from China has also contacted Fedex and they are not giving any details for that.
Now it has been 45 days since we have got no update from Fedex as to why they have put my shipment on hold and why they are not getting this delivered. I have emailed the concerned person Mr Vaibhav and Mr Prithivi 35 times now and have emailed their support team at [protected]@fedex.com 5 times.