I don't understand any of these accusations.
1) ''if they are found to be receiving, attempting to gain an advantage by trading their card information or colluding with other users to gain an unfair advantage. These advantages may include dropping and transferring chips, discussing hands during play, using the same account multiple times, soft play.''
I have not played any card game on coins.game, only sportsbetting
Yeah those rules are for the poker abuse, not sports betting (arb betting, late betting, fixed match, by pass the bet limit with multi account, etc).
Kinda strange why their support only copy paste their policies for Poker game while you said that you only gamble on sports.
Without any replies from the coins game side, we will never know what is the reason why they blocked and confiscated the money on your account, I hope they will response to this case on casinoguru.