For me, 24-48 hours to reply to an email ( 3 different times). And only 6 days for it to arrive in WA State. I did put "I want to purchase booster" in the subject line, no idea if that helped but I figure they are getting many many emails some of which may be, well not really ready to buy customers?
They are selling well all over the Globe and with good reports, they ARE busy.
I use a yahoo account, could be there email filters are "junk"ing your email?
Keep trying, good product.
John