You say constant rain. One should understand that rain will wash off fungicide. The general rule is that one inch of rain washes off 50% of fungicide, and two inches washes off all of it. But it can be a lot worse. https://vegcropshotline.org/article/fungicide-applications-during-rainy-weather/. Copper is particularly not rain-fast. Also, be careful about expiration. Immunox is, I think, only good for a year. Daconil might last a few years.

"Is there anything else I can do?"

Not too much you can do, you've done more than I would. There's no escaping continuous tropical rain forest-like conditions, esp if direct sunshine is scarce with overcast skies. Having a garden situated in a location that gets early morning sunshine and late afternoon shade is ideal to ward off potential fungi problems. Having the plants dry off asap from overnight rains and dew helps.....not that I'm any help, nyuk, stuck inside during a nice rain shower now, we need it here.

When I say repear it means Immunox every 3 weeks, daconcil eveyr 3 weeks and same for copper. I do know it washes it off which is not helping but when it rains 6 our of 7 days for a month I have to apply the one day it does not knowing it will get somewhat washed off.

I know there might be nothing else I can do but I am desperate:)

No pics?