What you did was tantamount to bringing a bunch of human babies into your home and immediately stuffing them with a huge gourmet dinner and a few bottles of wine. No wonder they're sick. The best you can do for the time being is to flush the soil with water and cross your fingers. Also try to put them in a position as similar as possible to where they came from as regards light, humidity and temperature. I doubt that is your kitchen table, unless they are only there for the photo.

They should have been given deeper and wider pots a very long time ago.

I am currently deployed but will ask my son tomorrow to try to repot these trees. my daughter try to flush them but somehow its getting worse so my last option option is to completely replace the soil. hopefully it can hang on until I get home 2 months from now. really appreciate the replies. thank you

its too cold right now in california thats why I keep them inside

Potted mangoes are very sensitive to 1) over-fertilization and 2) overwatering. They're a challenging plant to grow well in a pot. They need a medium with superior drainage and aeration. I water mine with collected rain water and only fertilize when they are actively growing, usually in spring and summer.

Since yours are so new, they could be in shock from the shipping conditions.