Maybe there's a mistake you made, like creating or logging into your sportsbet.io account when you were connected to a VPN, or perhaps you share a Wi-Fi network with a family member or friend who also has an account on the same platform?
maybe he made a mistake like that, but i would imagine they use other info to link multi accounts. i mean, if they only use IP address as proof, accusing a player of having multi accounts based on that only is pretty weak imo.