If it's not critical or I immedeatly think I can replace it (even if service itself thinks they are unique): 1 days(and for it doesn't matter if it's happen on USA Independence Day or Chinese New Year), to get at least some response on what's going on. 1 week to fully solve issue.
if it's critical...start with above but will scout net for replacements, if where are REALLY no replacements...will try to make as much public uproar as possible to make issue fixed
last 2 real issues with paid-for services:
- first one - 3 tickets, about a week, end result - replacement for necessary functionality found for same price. account disabled on old service
- 2nd one, in 2 days from time I was actually aware of issue:e-mail about my usage trigger error in their code. they are investingating and be back soon. (this look plausible for me given service nature and my data's nature). as apology for issue they give some free time on same billing plan I was on.