Lol this is really funny, yesterday i did login in my bitcasino acc and saw that i got the 5 mbtc but i did not Touch it because of the giveaway mistake, now after i saw here that i can keep it, i wanted to login again in my bitcasino acc and it told me: "your acc got closed because of inactivity" 😅
Have you contacted live support ? who knows there is a system error and support will guide you, as far as I know Bitcasino and Sportsbet never close inactive accounts
If the user is not active within 6-12 months then the account will be in dormant mode and generally you can reactivate after contacting support
Even if your account is permanently disabled, there is usually an email notification, did you see it?