Hi Rob,
You do get about a bit.
I hadn’t realised you were using Oyster rather than contactless. This means that the weekly capping is applied during the overnight run through the back office. In your case this would have been last night, so you should have an appropriate refund applied next time you touch in with that card. I’d be interested to know what you actually get, on the basis that neither journey to/from Brentwood was actually charged because you’d reached the daily cap.