[vinylweatherman]

The "UK Number" simply goes to the call centre in Canada, which is currently swamped by aggrieved US players.
Not replying to E-mails is pretty common with Neteller, phoning is the only way. The best time to phone would be when much of the US is asleep, which for the UK is actually quite convenient, an 8am rise should suffice (3am US time).
Curiously, I called today, during UK office hours, and STILL got Canada; who helpfully informed me that they never received my withdrawal request into their system on Tuesday. I politely informed them that if they routinely sent out an E-mail confirmation of receipt, I would not have been in the position of waiting in vain till today while blaming the Americans for swamping the system.

They have mysteriously locked accounts before, usually when one of their security flags gets tripped. They even locked MY account last Christmas, and I had to phone to find out why. They are not as bad a Click2Pay, I had to be more insistent with them to straighten them out and get my charges refunded (that should not have been created as they were for unnecessary currency exchanges).