Parent listing has the same variations for the same products. Amazon is zero help

So I sell pillows.

One size is 18×18

The other

22×22

The issue is the listing has multiple selections for the same size. For instance..

18×18 18”x18”

I understand that this means I’ve added the product incorrectly.. but no matter WHAT I do, I can’t change it. I’ve used the variation wizard, feed files, contacted support probably 100 times, and nothing is working. I can’t even change a pillow variation title where there is a spelling issue. It’s driving me crazy.

If anyone has any input or suggestions I’d be eternally grateful.