If your opponent has accused you of cheating, use the built in PS4 DVR feature to record or screenshot proof that you're not.
- To record the last 30 seconds of gameplay, tap the middle PS4 button and press X.
- To take a screenshot, tap the middle PS4 button and press Y
- Here's a 30 second video on how to use the PS4 DVR: https://www.youtube.com/watch?v=hMQsfjZGZWU
Failing to provide evidence may mean you have to rematch your opponent or in the worst case scenario you will be fired from your team.