Property Manager incorrect move out date

[Dallas Savage]

So I recently cancelled my contract with a property management company and tenant, and when I tried to cancel the lease with the tenant and the contract with them. I assumed the contract would be up in July and they told me I had to cancel the contract for August. Now I find out the tenant moved out in July  and they state that is when the contract was up. is there any recourse or am I missing something?