Hello Ozawa-san,
The SLA's reference when you will receive a response from a live representative from Marketo and depending on the priorty of the case, the response time will vary. We reply to P3 and P2 priority issues during normal busines hours. All reported P1 issues are replied to within our posted SLA regardless of business hours.
About SupportYour support cases do take top priority with us and our team will respond with updates on the status of tickets if we are still working on a resolution.