Exactly as Typloshioon said, if you got banned before the rule was changed, you have to wait the 7 days..
Its the same thing as in real life, if you get caught for "burglary" etc and you get 7 days in jail, then 2 days after they change the rule it so you only get 3 days for burglary they wont reduce your sentence. Your sentence will stay as it is.
Etc: If I get caught for stealing a bottle of coca cola in a store I get 3 day jail.
Then 1 day after I get caught, they change the rule so you only get a fine for example 300 dollars. Do you think they will take you out of jail and give you fine of 300 dollars? Ofc not. Since the rule was changed AFTER you were punished you will have to sit your punishment.
Also when you create account you agree that rules can be changed at any time and
the staff can delete, ban, do whatever they want with your account and your
submitted information.
Last but not least if you go on Realesta website and go on the rule page and scroll to the bottom it says
These rules may be changed at any time