I requested a withdrawl on 11 December and I'm still waiting.
At first TW told me to wait, they then promised a remittance advice which it took 10 days to email.
My bank told me in February that the payment was made to them on 11 December and returned the following day because my name and account details were not included with the payment.
TW consistently don't reply to emails.
I don't think TW are deliberately not payng but they seem to be incapable of resolving the issue.