My question involves landlord-tenant law in the State of: Ohio

To make a long story short - I have very limited time available, and running out of options.

I am currently a sublessee. The lease was originally for a year, with the previous tenant unable to stay due to medical reasons.

After moving in, I had no issues except for a plumbing issue once (horrible winter in Ohio, old pipes) that took some time to fix.

The previous tenant submitted his 30 day notice to terminate lease, and I have been notified of it for some time.

The issue I have is with the leasing company's/Landlord's treatment of me as a non-tenant. About a month ago, I got in contact with the landlord to let them know that I will be out of the country, but want to pursue a new lease upon the previous tenant's lease ending. I was reassured multiple times that I have no issues with writing another lease and that I will be able to stay in the property after the previous tenants lease expires. He has been moved out completely, and I have been the sole inhabitant of the property.

I informed the landlord that I will be out of the country on multiple occasions for majority of June, and was told that I need not worry about anything. Turns out that on the 17th I received a letter of vacation - stating that any and all related properties to the old tenant must vacate by the 30th.

This is devastating as I literally have a few days to completely vacate and find another apartment. Despite the landlord's reassurance. If I had known of their intent of not offering me a new lease, I would have made preparations for moving/or finding another property. I called the management company and they would not offer me reasoning for why they were going back on their word, citing that I was not 'their tenant'. After speaking with the current tenant from whom I'm subleasing, they are citing the plumbing issues as the main reason why they don't want to extend the lease.

It's all very weird as it seems that I was basically blacklisted from the property...for no violations at all. No warnings, no conversations, nothing.

What should I be pursuing in this situation? I'm thinking it's best to just cut ties and get another place if they're going to treat me like that. But on the other hand, moving in 5 days, finding another place, and paying the crazy out of pocket expenses are something that's quite frustrating.

Please advise!