Post Rejected for Payment

Received 6 rejected payment email from PayPerPost yesterday. Which is due few days ago. I wonder why all the reason given are the same?

Unfortunately, your post does not pass the final review process. Posts must be live for at least 30 days in order for payment to be received, and your post is no longer available.

I definitely didn't delete or remove the post. Why should I do it after work so hard to get approved the post, right? Quite upset when received email like tat..seem like all the hard work have spoilt...Donno how to settle it yet..Already email PPP to request them check again..Hope everything will be ok ...