If your account didn't unbanned more than 30 days (1 month) it's likely you have got perma-ban.
If you bothered to read his post you would see that the ban duration was stated
Ban duration: 3 days.
I have read it. But there is still the chance he got perma-ban before his ban duration ended, right? Ex: he posted with his alt account on outside Meta while his main accou t still banned.
And i also think "the longest"time for ban is 1 month, after that you'll get perma-ban (stated on signature campaign guidelines)