Tenant keeps complaining

[Kar Sun]

My AC has gone on and off for the past week.

We are checking on it daily and additional fixes are required.

It will probably take additional couple of days to fix it as it has been trial and error.

We are keeping the tenant in a loop but she has gone crazy.

She has actually been a huge complainer and her demands id that everything is fixed right away.

She has mistaken us for hotel service staff because she thinks she is at Ritz Carlton and we are her bus boys. 

She has demanded that we bring on a licensed and bonded specialist and that the property is uninhabitable (it is 77F-82F) inside.

She also stated that when we rented to her we told her that everything was working well.

Well, everything was working well and we have a walkthrough checklist.

Again, I am not in a business to spend thousands on the new AC unit or pay someone 1500 to come and look at it.

This is fixable and take time.

We also took a portable AC unit to her. 

Basically her lease runs out end on October of this year.

I want her out as she has been extremally mean and nasty.

I already told her (verbally) that her lease wont be renewed.

Do I need to sent her the official letter for early lease termination?

My contract does not have early lease termination clause in it and I am in Tennessee.

My preference would be to give her until end of August and start showing the property right away.

Otherwise I have to wait until September to start showing the property.

Thanks