first thing you need to do is remove all adsense ad codes from your site. now go to adsense, turn off auto ads and archived/delete all old ad units. now you have to wait for weeks/months.
mine ad limit got removed after 43 days.
you can sign up for google ad manager/double click for publisher. create and place ad units on your site and see ads are coming or not i think ad will not come but give it a try.
and in future use google ad manager instead of adsense for reducing chance of getting adlimit again.