For deleting auctions, go to auctions page under your icon on the main site, click the 3 dots! Auctions that ran a month or so ago can be deleted. As for unfollowing, you have to individually go to each user profile, not their ping profile, but the one for ych.commishes.com/user/insert username and unfollow them there. I usually keep one of those profiles up and go through my ping followers and copy paste names to get it done fast lol

No clue on deleting auctions as I don't post them. To unfollow, you do it from the person's page. Understand that you must unfollow wherever you followed, ping follows are different than auction follows, etc. It is somewhat confusing and unintuitive.