I accidentally changed way too many premium stash tabs into merchant tabs.

Hi GGG Support

I changed most of my premium stash tab into merchant tabs without knowing they can't use as my stash. Can I do anything with too many merchant tabs. If possible, can I remove few merchant tabs back into my stash tabs? At the first few days in this league, I thought it was a limited time changing so I quickly upgraded most of them.

Thank you.