I have tried to transfer my account from battle net some times but it just fails every time
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This could be bad advice, so do it at your own risk, but here we go. My transfer failed multiple times. But, I went to my Profile, and it showed that my Steam account was linked. So, I took a leap of faith, started the game, accepted all the scary messages, and I found my character had indeed been transferred. So, ONLY IF your PROFILE SHOWS A LINKED STEAM ACCOUNT, it might be worth a try. However, this is still a risk! BE CAREFUL. If your profile does not show a linked Steam account, DO NOT PROCEED AND WAIT INSTRUCTION.