need help with what to do

If you did work on a project, and if you have not been paid for that work, you could file a mechanic's lien against the property. The time to file a lien on residential property in Ohio is within 60 days of the last date of work. 

Alternatively, if the amount owed is less than $6,000, I would recommend skipping the lien (since your claim is against the owner, and to foreclose on your lien claim you still have to prove a breach of contract claim against the owner), and instead just filing a claim against the owner in small claims court (think Judge Judy) where you can each present evidence and have the court rule on the claim then and there.