i've read, someone got banned and he created a new account on official application, then he linked to facebook and login on mod application. it worked. but your problem is you can't login with mods at all? have you tried installing the apk on the your phone second space? I guess if you haven't installed the application on your second space, then you can still create another new account there. if you still can't login i think reboot the phone is my last wise.
or if you have an emulator on your PC, then you can play with.