Very itchy scrotum and tip of penis, taken canestan, fluclonazole, no avail. Swollen penis foreskin and anal fissures, what could it be? It's depressing!

Eczema. Sometimes eczema acts similarly to 'jock itch' but doesnt respond to anti-fungals. You can try desitin (zinc oxide diaper cream) (used for diaper rash) for relief until you can see a doctor, see if a steroid might be helpful, but should be used cautiously in that area.
Tinea. Sounds like a fungal infection. You tried Fluconazole tablets orally? Try otc Clotrimazole twice daily for 10 days and attempt to keep area very dry.