Tenant against landlord

[Ashley Del Valle]

Hello I rent a townhouse in Georgia, my landlord has refused to fix the heating and ac unit . The leak in the roof that we have had since October. Due to the leak we now have mold. I had someone come inspect it and yes we have mold . Can I with hold my rent money ? The lady the is in charge of the neighborhood told me the reason I was added to the list so late is cause she wasn't pay her HOA fee. What can I do ?