Poor returns/exchange experience

On the 25th of November I placed an order for a bunch of different clothes, order number ***, I received the wrong pair of swim shorts which I then asked for an exchange. I was then sent the exact same pair of swim shorts back again instead of getting the pink ones. So now I'm stuck with two yellow pairs instead of one yellow and one pink. Now the app says I cannot exchange or refund the INCORRECT pair of shorts. I'm happy with an exchange but this is proving to be rather annoying so would prefer a refund. I sent a message before you incorrectly sent the shorts for a second time asking that you ensure that they were the pink pair but today the wrong shorts arrived again.. How difficult is it to read the reason for the return and look and the picture I attached to compare it to what the actual order was??