Team GB captain Emily Scarratt told BBC Sport: "We weren't good enough in that game. We made too many mistakes and weren't clinical enough. We had a gameplan and we needed to stick to that.
"Now we have to dust ourselves off because there is still a lot to play for. Losing games is often the biggest thing to stir you on. We'll use that disappointment to give ourselves a kick up the bum."
Britain can gain bronze by beating Canada, who lost 17-5 to Australia in the other semi-final, in the third-place playoff later on Monday at 10.30pm BST.