In the meantime, you cannot play. You have been determined to be a threat, so you no longer can play, until you can prove you are not a threat by providing a proof of purchase. If you cannot provide that proof, then you can no longer play the game, unless you buy another copy.
From my personal perspective, I see no reason to feed a company who would do that to me. Once you buy it, you have said to them, it is ok for you to assume I am a thief, a hacker, and/or a cheater. Personally, I will not do business with a company like that. No game is worth it, to me.
I am all for IP protection, but like most things, there is a right way and a wrong way to go about doing it. I believe if you adopt the philosophy that all people are crooks, then you will end up doing it the wrong way.