I don't think you can undo that. Start a New Game should be the best solution for this.
The good thing about Starting a New Game is now you will get back all the missing content that is related to CockTwitch and Streaming.
The bad thing is you have to start all over again. But it is worth it, trust me since your Stream Account is gone.
If you Stream and get enough Followers or Subscribers there will be Sponsors offering some Contracts to you each day. It's pretty much work as a Quest for you to do during the Stream, and once you Complete the Contract with all of the Requirements you can then claim the Reward.
There is also a Story related to CockTwitch too. After you gain enough Followers and Subscribers there will be a weird Email from someone. I'm not gonna spoil it any further, but I will tell you that it's not that wholesome.
