I'm sure Transferwise could help with this, just as your local bank would with a wire transfer. But remember that Transferwise have fulfilled their part of the transfer perfectly. I imagine they're wrongly getting it in the neck about this from a few confused customers.
I know they are because when I contacted Transferwise to get my payment confirmation they said:
"You are apparently one of the numerous customers affected by Bitstamp's delays up until now all payments to them were actually there, but there's been a delay in them confirming the receipt."
I'm also going to be left with no choice but to attempt to recover my money via Transferwise if this isn't resolved by the end of tomorrow.