An ineffective D.I.Y. dye

I found this great 80's shirt dress at a vintage shop up north. The only hitch was that I didn't like its bubble gum pink color. I bought some dye at the local JoAnn Fabrics, hoping to change it to a lovely shade of wine. Yeah, not so much. It's now more of a raspberry. Since the shirt is 65% polyester and 35% cotton, the poly keeps it from absorbing the dye. I want to try again and really soak it for a good long time. Anyone have any advice?

Before: bubble gum pink. After: raspberry pink.

I definitely recommend using rubber gloves and a 5 gallon bucket.

You can see the different shades. The pink buttons are the original shade and the foam from the shoulder pad is the shade I was hoping to achieve- a nice deep wine.

...Hopefully the second time will work some magic.

Yours,