Emoswimsuit - Tie dye Square Neck One Piece Swimsuit

On my recent order I mistakenly ordered an Emoswimsuit - Tank One Piece Swimsuit × 1 size 10 when I should have ordered size 14. Could I return the size 10 and exchange it for a size 14. If so could you please inform my what I need to do.
The order was for 3 swimsuits
Emoswimsuit - Tie dye Square Neck One Piece Swimsuit size 14
Emoswimsuit - Pink Green Floral Sarong Front One Piece size 14
Emoswimsuit - Tank One Piece Swimsuit × 1 size 10

I was skeptical of this suit because: A) ordering a swimsuit off the internet seems like a crap shoot; and B) I've heard mixed reviews about Cupshe overall. However, I am SO glad I purchased this. I usually take a large in one piece suits (my Knix swimsuit is a large) so when I pulled the medium out of the bag, I thought it looked a bit small. It fit like a glove - like it was cut/made for my body! The stretch is perfect and the stomach has nice ruching to flatter the mid-section. And the colour is GORGEOUS. I ordered it in royal blue and it's definitely more of a pool blue but just stunning.

The neckline on this is very flattering and it fits well. Ordered a size large I'm a 34DD.

I LOVE this swimsuit! My tummy is my problem area, and I usually have to compromise style for fit. I DID NOT have to with this! Highly recommend this style and print!

Good quality with cute ruffles, low V but it stays put so don't have to worry about slippage. Back ties well in a cute strappy design and the bum area has good coverage. Very flattering one piece, highly reccomend!