Prove you're good with customers, with numbers
Every support resume says 'excellent communication skills'. Yours should show it with the metrics your team was measured on: CSAT, first response time, handling time, resolution rate and volume. Even one or two of these make your experience concrete.
Add context so the numbers mean something. '45-60 tickets a day at 96% CSAT' tells a hiring manager both how much you handle and how well you handle it.