[Bought the bundle after buying the skin separately - it charged me twice for the skins]

Hello,

I had bought the new Wukong Deluxe skin (just the skin) before I went ahead and bought the bundle for the remaining items.
But I was charged the full price despite already having the skin.

Just to confirm I did the same thing the Nidus bundle as well (I already had the skin)
I would not like to charged twice for one skin please. :( 
If there is a way to : 
A - To revert these purchases and get all the plat refunded
B - To not cancel out the double deduction I have faced on two of my skins along with the bundle.

Thanks