I'll try to notify their support about this and get them to take a look into it from their side, it's probably their automated system locking you out again instead of them intentionally doing so. Am I correct that currently there is no fund left on that account?
edit: reuploading your image because the original are somewhat unable to be shown
Yes, you are correct, there are no funds.
I really doubt it's automated because it's not standard to just shut down accounts that have been inactive.. I have accounts on other casinos that I haven't touched for 1 year+ and I can login just fine.