It is well-known that a fiat withdrawal on Bitstamp involves KYC information. They have chosen to play by the rules the governments impose, and that's perfectly OK - there are other options if you don't want that.
They have adverted that they're having a high load of support tickets (because of the rally-driven demand increase). So, have a bit of patience.
Patience? He didn't get a stupid response to his ticket for a week, that's not normal. Answering a ticket takes a couple minutes, you don't have to resolve a situation instantly to be able to give answer or assurance. If they got an increase in tickets they should make all employees including the managers sit down and deal with it instead of making people wait for so long.
even though bitstamp is a few years old now. dont think of it like a bank with its own call centre of 100 staff. these businesses are usually all skeleton crew run. so dont expect the same 24 hour response service from established industries.
secondly fiat rules are fiat rules. what i think is bitstamps failure are
1. by even allowing a customer to initiate a fiat withdraw without being KYC'd.. it should not be an option. that way customers wouldnt get locked in
2. not being more communicative/helpful with explaining the issues with wanting fiat
what the op may have failed at
3. the OP says 'last week' but its only monday. so for instance if he done withdraw on a thursday evening. the OP may count that as 'last week' or 5 days.. when infact there was only 1 business day.
if it was wednesday, thats 2 business days. so maybe bitstamp needs to explain when they actually expect to reasonably respond better.
from what i could guess is if op made a trade on monday, couldnt get fiat out.. got a response on wednesday to say about KYC requirements. op chose to want to cancel fiat withdrawal. and then should be getting response today or tomorrow if there was a 48 hr response time
now some tips
usually finding their active social media of business helps. and POLITELY saying "please respond to ticket #xxxxxx its been X business days" usually kicks them into action because it starts to make them look bad, without you having to use bad words
when emailing ensuring you are replying with reference numbers or ID numbers, because sometimes businesses dont recognise emails or have access to who's email belongs to which customer. so having reference numbers or ID/usernames/transaction numbers or support ticket numbers included in email helps
lastly emails are usually less 'support' related and more informational related. see if they have a support ticket system(which bitstamp does) and use that