There is absolutely no any disclosure anywhere I could find that specify $300 as a limit to push you to 30 days. "
Up to 30 days" is the standard, regardless of item price, sometimes it takes longer, sometimes shorter depending on shipping time, return processing time due to holidays returns, etc., they leave some room for themselves.
This is standard official
policy.
What rep is told you is just made up on a spot excuse, next time ask him to forward you the link to that policy.
And there is absolutely no reasons for personal attacks even if you disagree on something. Happy listening.