I cant tell anything by those pictures, except the general area afflicted :(
Is it like this?
Or more like:
Fungus medicines usually do not treat fungus, btw- as true fungus in bettas isnt common. Most medicines, probably what you tried, were treating either a gram-negative or a gram-positive strain of bacteria.
What was the name of the medicine?
Also, please fill out the sticky at the top of the page in the disease section for us. If you could get us better photos of his face, that will help a ton! Try putting the camera into the "macro" or "flower" setting, avoiding flash. Keeping the lights around the tank on will give you enough light :)
For now, I suggest you do a 100% water change on the tank. Empty it fully, rinse it out (no soap) and add new water and conditioner in. Bob the fish in its cup and acclimate it by floating the cup and adding in new water every 5 minutes for at least 10 minutes (to avoid shock).
With more info, we can probably set your fish right :D