Tenant asking for "New HVAC system"

[Gerardo Escutia]

I have a tenant who just moved in about 2 months to newly remodeled rental (everything is new) that purchased this year. I had the AC system checked by HVAC company and everything works fine according to the company. The temperature gets to 72 Fahrenheit on the hottest day here in the south GA when temperature outside is about 100 degrees. 

The tenant complains the temperature should go to the 60s, when the thermostat is set at 64 degrees. I had the AC check by HVAC tech twice and they checked the Freon levels and cleaned the coils and technician said that everything is fine that they should be happy it gets to 72 on the hottest days of the summer. 

The tenant called again and they are saying to send another technician to have the  system check again. The only option to get the AC temperature any lower, is to get a new AC unit. What would you guys do?