Yes, Vanguard! At least we know about that here...
There is a vaccine overview on the YT Library.
The 5 in 1 should probably be used.
I would never used tea tree oil without washing it off and then still I don't use it.
Revolution would probably be the treatment of choice here, but it is two doses two weeks apart.
A lot of the sprays used for this are going to be highly toxic and could take your pup's life. I'd look for an Engligh speaking vet.
Where on your pup's body is the fungal issue?