In reply to radioactivekid:
> Yeah, I sent them an email asking if they had any idea how long it would be but I've had no reply. That was from about 2 weeks ago.
Ok, fair enough.
However, it's worth pointing out that actually sending an email is no guarantee that it will arrive at their end, or that your mailbox will not put their response in your junk mail folder, or it will get marked as spam before it gets to you, or that your mail-provider hasn't been blacklisted (even briefly) so that they never got your email in the first place.
So, I'd phone them, now.
An aside:
I speak from experience with that lot, as I spent a lot of hours (over a period of 2 or 3 weeks) with an irate customer who was convinced of the fact that a company in the USA who send him a lot of business via email were being blocked by our mail server, and I could tell him until I was blue in the face that their emails were not even reaching our server, so he needed to speak to the senders because the issue was clearly at their end.
Eventually, I asked him to give me a technical contact at the sender's end and with the sender, and - bearing in mind timezones - he started receiving emails from them within 24 hours.
His response?
"It's started working again now, what did you change?"
My answer?
"I spoke to the sender, who had somehow managed to put your email address into a filter which blocked them sending emails to you. I didn't have to change anything, because, as I suggested earlier, the problem was at their end."
I got no response from our client, not even a "Oops, sorry, thank you for your time"