I tried everything for 20+ years, but it ultimately came down to a good dermatologist. If you live in a country with decent healthcare, it should cost you nothing or very little. Otherwise, try a zinc supplement (one from a pharmacy, not the internet!!).
As to home remedies, I know that women in my area have used sour cream for centuries - it appar......
Is there a time limit (because internships are usually only a few weeks/months long)? Is the workplace well-known or significant enough to gain you a strong cornerstone in your resume? Your workload seems tremendous, so you should earn at least that (think "The Devil Wears Prada").
I say it's time to either leave or renegotiate, after all you've ha......