(ca) My Brothers Foster Care Placement Is Interfering With Our Visitation

me and my brother are both in foster care. I'm in extended foster care living on my own, and my brother is placed with our bio aunt and her husband. I've had many issues with them denying my visitation with my brother, such as refusing to schedule visits, scheduling a visit only to claim they never scheduled and agreed to one after I arrive to the meeting location, etc. because of this we had a CFT (child family team meeting) to discuss the issue comprised of me, my brother, my aunt and her husband, our social workers, and a mediator. There we agreed that 1. I was legally entitled to 2 visits a month, and 2. the visits would be every Friday from 1-3pm. Their new tactic has been scheduling activities that conflict with the visit so they have an excuse to cancel/reschedule. The latest incident has been this week. This Monday they confirmed the Friday visit, but then today (Wednesday) had my brother tell me that they were going up north for a trip on Friday and that I'd have to have the visit on Thursday instead. They know it's hard for me to re-schedule the visits on a dime because of several different factors. They've worn our social workers and attorney down to the point where they're willing to just go along with them, but I wanted to ask if there's literally anything at all I can do about this? is there any law or rule that prevents them from doing this? the attorney was originally planning on getting a court order to mandate visits, but it didn't come to fruition. I'm so exhausted from fighting them just to see my brother once a week and I want it to stop