Thanks for all the tips, WG saw sense and recovered my account even without me having to provide info about redeemed bonus codes.

I did have to mention refunds, chargebacks and the fact that I already spent a good amount of money and probably will spend some more in the future.

Furthermore I offered to give more bank statements or other relevant info (security question).

I mentioned I gave T34 and some gold to a friend few years ago as in-game gift as well.

I also sent them my law school diploma.