I've had the same problem with sportbet.one
 Mine started over a year ago, followed self exclusion protocol and waited 5 days and account still allowed me to sign back in and continue to gamble.

Complained as i lost thousands and they only offered $1000 back due to their failure in responsible gambling.

They told me to create a new account with them to receive the funds, and even offered me a bonus to keep playing, all this is after explaining to them my addiction. Ive emails, live chat logs etc to evidence this.

Since then ive used the account with them during relapses, as you can always keep opening it. Its a real problem for gambling addicts such as myself. They say they cant block IP addresses, yet they can see from others when they've abused bonuses etc.

The company is extremely immoral, ive a history of begging them to block accounts, which just got ignoref for months and cost me thousands.

Please, anyone with sense, stay away!