Is there a duration on how many days your ban would last?
Nope. I was banned permanently for a referral link i guess

The wirex referral links are long, and look shady but the domain still ends on "wirexapp.com" which is the official link of wirex.
You mean that you have posted that referral link and you banned already?
If that minor offense, I think it only 7 days banning for the first offense.
We have a rule here in forum dude that avoid posting a link that is possible happen that you might get banned.
Good luck mate hopefully soon you recover your account.