At the current time I know SBS is overwhelmed by amount of emails. I myself haven't received a response for e-mails that I have sent months months ago. I know that sometime in the future there will be an option to change email however there is no ETA when it will be implemented.

Your best bet is try using IRC chat or Discord when they are online or active on it and try msg them or @ (tag them). Its probably the best bet other than waiting for this feature to be implemented.