Buy Box issue

Hello, I have recently opened a new professional seller account and all of my listings are active on there. But somehow the amazon is not granting my listings the buy box. I have made sure to do all the required for featured offers but still no luck. Can anyone help me out here if its just me or this has happened to someone else too.

If this is a standard practice by amazon then how much time this might take for this buy box issue to be resolved. The chat support was of no use as they never have the enough information.

Please help!!!!