Strange HB incident

Hello, do someone have same experience with HB?
Other day I opened my email box and found email from HB: There are keys for your purchase. But I didnt make any purchase. Not at 2 am. Som I went to my account and found 3 bundles with revealed keys. So I changed password, turned on 2 factor autentification (I didnt known about it), and unlink my card. I didnt wrote to HB, because keys was revealed and I accept loss of money. Later I tried one of the game I didnt own on Steam and to my surprise, key worked. So I tried all games I didnt had on steam and all worked. But there wasnt way to check other keys due to steam system. So I sold games from others bundle, every key worked. I was ready to send payment back, if key doesnt work. But right now I have got mail, that HB refund those bundles. Now I dont have those bundles in my account. So I dont know if it was mistake on HB side, or it was some ethical hacker, who tried my account security and put everything to normal. But I sold keys. Do HB revoke activated keys?