Help android basic features not working

Roy Eldar

so i woke up today and tried to clear some storage because my phone went full. i deleted some whatsapp messages and then whatsapp told me to restore data from backup. since i sleep with airplane mode on i started the restore and turned it off. my phone went black and i had to restart it to get it working, but some android stuff wont work and i dont know what to do. examples are:

bottom circle and square buttons not working
no settings drop down bar and no notifications
no lock screen

i cache wiped but it didnt help. what should i do?