Write here. Nothing of yours is needed.
You get a link to the ticket, printed once. Save it the way you saved the order number — it is the only way back to the reply.
support@monerostash.xmpp.pending
No account, no address, no phone number. Both are links, not identities.
Use these for anything that is not about a specific swap.
Where an order is, without its number. Nothing here is indexed by anything else.
Whether a swap is legal where you are. We do not know where you are.