Quoting to give further --although unnecessary, as I'll still do it regardless-- relevance:
Are you 100% sure you didn't use multiple accounts on Sportsbet website?
We can always call some of the Sportsbet team members and they can easily prove if this is true or not, without revealing your personal information.
[...]
Yes im sure i didnt used multiple accounts for what reason i should do it ? I would never risk 1300 if i was doing it. [...]
I'm notifying Steve about this thread, he'll usually come to give SB's side of the story.
Meanwhile, just curious, OP, what's the reason behind the request to buy an unverified account? Disregarding that the said account is not the one being questioned right now, I don't think buying an account is allowed by them, or at the very least, it's heavily frowned upon.