@Stooky
You can only solve this issue by telling BitShare your username via PM.
I know BitShare ever threatened affiliates who told bad about their service so that many people wouldn't like to let him know their usernames, but now you have no choice.
If you really want to solve your problem, you can only give him your username.

Although you have told something bad about their service, I think BitShare will not ban you immediately.
We have seen so many sentences like "next time, you will get banned" said by BitShare in KWWHunction.
The phrase, "next time", means you still have another chance.
You shouldn't have abandoned yourself so early.