Can't create compute instance - Out of host capacity and can't change Region
I just signed up for Oracle’s Free Tier program and chose the home region of "Japan East (Tokyo). When I was trying to create the new computer instance, I got this message of "Out of host capacity". I did a research online and some people suggested to change the Region. So I tried to subscribe to New Region of "Japan Central (Osaka), I got another message saying "You have exceeded the maximum of regions allowed for your tenancy".
I'm stuck here. Please help.