MetaWin has its chat on the website. Players can always ask questions there if they want feedback and help from the community. A dedicated support is something completely different and private.
Or, just throwing a feedback form with Emails.
Last time, they throw me a feedback form with reward 10$. Maybe throwing again a feedback form with reward gesture 5$, I guess they will receive a lot feedback cause the feedback is being rewarded.
Last time, I was in other casino "Stake" they throw me a feedback form without reward.