I had AliCloud experience similar to OP but they gave me 24 hour deadline.

"We have temporarily closed your Alibaba Cloud account due to suspicious activity. Please provide the following information within [24 hours] by email to compliance_support@aliyun.com in order to reopen your account: ... If you fail to provide this information your account will be permanently closed, and we may take other appropriate and lawful measurers. Best regards, Alibaba Cloud Customer Service Center "

I provided the documents in ~30 hours because that's when I saw the email. There was no further communication from Alibaba. I assumed everything is ok, but in 2 weeks my account was terminated.