Created variation parent listing

Hi , it won’t allow me to start a topic in sell on Amazon category so doing it here. I recently added 9 fast selling items to a parent listing as they are all the same but different styles of the same item as I got more variations in ( I suppose I thought it would jump start the new colour variations) but since they all formed under one parent listing the sales have dropped off a cliff. Is there anyway to undo this as something has clearly gone wrong. 3 sales a day from each variation to one sale on all variations .

Thanks