Property Management / Landlord Agreement

Hello,

I recently had a dispute with a property manager over damages not
accounted for when a tenant moved out. These numerous minor damages
were reported by the new tenant upon taking pocession of the house.  I
hired a property manager becuase I am 3000 miles away. The property
manager's position was a clear refusal to account for the damages, and
for me to make changes to his final accounting statement to the
tenant. I agrued that since I am not there to personally acces the
damages I cannot properly account for them.

I stated in an email to the property manager that I had decided to
terminate the agreement, and would have to him in writing within a
week. The agreement stated either party may terminate the agreement
with 30 days writen notice ?

Question:  Does my email terminate the agreement a that point, or does
it have to be in writing with a signature ?  Can the 30 day notice be
waived by the party not initiating the ternimation ?

The owner of the realtor stated in a letter that they had no any
obligation  to provide ant services to me after that email. But, the
deposit to the vacating tenant was still unresolved.

I intend to sue the realtor for the damages and I'm thinking of
believe he was wrong to refuse to account for the documented damages.

Thanks for any thoughts.