Without pics, there is little to diagnose and advise.

Never spray vinegar on the plant leaf surface. Vinegar is great to lower the water pH or the soil pH but too acidic on vegatation.

The soap was a good idea mixed with water and spray misted.

Makes the leaves nice and siny too.

They might be too far gone, but I would go and spray water and a tab of baking soda on the leaves....just a tad...like one teaspoon per spray bottle.

You will need to try and neutralize the high acid vinager now on the foilage.

Good luck.