They get extremely busy every time they have a special running, so it is quite likely the system is just completely overloaded just at the moment. I would either email them, or just keep trying.
I also guess it will make a difference what time zone you and they are in. For me I know the time zones are different so just check if you are trying to ring when they are sleeping - in which case it is quite likely that their message service is just full, and they will sort it in their morning.
Often they will put a note on their home page when they get behind.

I usually don't order anywhere unless I can give my credit card verbally. I did notice in very small print below that it's for membership & goods to be shipped only...not for designs. Thus I haven't ordered from them. Hope you get it straightened out. BUT it does sound like their message service is full!!

No, never with SICK. They are usually extremely helpful and very quick to reply to my emails, but (Peter? memory lapse i think that's his name) does work extremely long hours, everyday, and sometimes he needs to sleep so just crashes at his desk.
Please email him, he is truly a very lovely 'Person' hugs n roses, M