adding a variation to another seller listing

Hello guys, im trying to add a variation to an existing listing, for a protein powder product, i got approval to sell the current flavours but i wanted to add a new flavour, it first i managed to add the new flavour but after couple days it became inactive and when i try to activate it and click request approval it says: “You are not approved to list this product and we are not accepting applications at this time.”

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so im wondering why is it i got approval to sell all the flavours but adding a new flavour of the exact same product is not allowed, is there anything i can do to fix this?

tried to contact amazon but their responses are kinda bottish