I apologize for my late response and thank you for all of your patience while waiting for a reply. I definitely understand how frustrating your situation must be, and I wanted to make sure that your concern was acknowledged. Do you still need help with this issue? I know that there's been a delay in response since you posted.
Please let me know if you need further assistance.
I was merely checking to see if you still needed assistance. The only option I could think of that could help you would be to set up an Auto-Lock Timer which could help you out, but if they know how to manually unlock the door, there is nothing that can stop that from happening. The link above will show introduce the option to you.
Thanks for visiting the Community.
Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.
We hope you were able to get the help you need but if the issue persists feel free to create a new thread, and provide as many details as possible so that others can lend a hand.