I have an open ticket - 74 days now for a missing NEM deposit of 3,141. I did enter in the 'special message' correctly and have all details in the ticket with the TX ID and all addresses! No response, no nothing. Have pulled everything off Poloniex and moved to Bittrex.
I have the same problem. but mine is not as bad as yours as my issue has been unresolved for a few days. I also withdrew SC, and DGB, with no issues. is this a common thing specifically with XEM?