First of all I want to tall you that taxi ride from apartment to old(not central) tbilisi is max. 5 lari. Would have asked me i would say.
About cost-you knew the cost before reservation?
As for fans and air conditioning-thanks for the correct observation.
Excellent guests! Very considerate and responsible, very clean and great communication. Thank you for the visit! They leave apartment in very clean condition. We would be happy to host them again any time.