How do I cancel just one weekend of an automatic repeat booking?

Hello! New to Rover and wondering how best to move forward. I had updated my calendar to reflect that I would be unavailable on 7/3 and 7/4, but suddenly, my repeat client who has automatically booked services for the weekends just showed up on those dates that I had blocked off.

According to my Rover dashboard, it looks like the money for 7/3 and 7/4 are already pending. How do I cancel just the walks on 7/3 and 7/4 and make sure my client doesn't get charged? Thank you!