Unfortunately, it sounds like the devs caught you using a modified version of their software, frowned upon by nearly everydeveloper, and they banned your account in turn.

Sometimes it is what's called a "soft ban", which is temporary. So check back in a week or two, to see if you can log back into that account. But if you have been branded with the dreaded "hard ban" then that account is permanently blocked from being used ever again. You can always create a new account, tho you will be stuck starting at the very beginning, which is sometimes more trouble than it's worth.

In the most extreme cases, they will not only permanently ban your account, but they may go a step further and ban your device itself from ever again gaining access to their app. It's usually done with your IMEI, which is a number that is unique to every device, thus can be used to identify yours. Making a new account won't work in that case, but there is hope yet,...

Thru app cloners like Parallel Space (get the 64-bit or Pro version, unless you have a really old device) and Dual Space. These are easily found and downloaded in the Google Playstore (which still boggles my mind why they don't delete it, as it's main use is for nefarious purposes, but that's for another comment, lol!). I've personally had mixed results with this method, but it has worked sometimes. Good luck!