Avoiding shutdown risk

Have had Venture X card for 2.5 years or so. Monthly spend $5-15K, always autopaid in full, happily collecting 2x miles per dollar and redeeming with airline partners.

Recently started taking advantage of shopping offers, specifically Klook's 26x/dollar. We travel a lot and stay in high-end properties, so I made quite a few bookings earning a few hundred thousand miles.

For various reasons, I had to cancel most of my hotel bookings (can't change the date without canceling, changed plans, etc). Except Klook processed the refund but never asked for miles back. So I am sitting on 500K+ miles, of which 200K should've gone back weeks ago - and probably about to cancel 2 more bookings for about 100K.

Given the reports of Cap1 going after smaller offenses, really don't want to run afoul their algo and be shut down. I'm playing a long game and don't want a few hundred K points that aren't mine either. But not sure what I can do to lower shutdown risk. A call might initiate a review that will raise it instead.

Thoughts, experiences, ideas?