when i tried to log in after months i was not able to and when i tried to recover my account it said that the username does not exist.
It is most likely that you have entered an incorrect format of your username. The chances of typing it incorrectly is much higher especially if your username has a combination of lowercase and uppercase letters. Or, you can just enter the email you have used when you created your roobet account for logging in as an alternative.
Be careful though, Roobet is strictly prohibits multiple accounts in 1 IP.
You warrant not to create any additional accounts from the same electronic device, household, IP address, natural person, or legal identity without informing the Roobet support team immediately.