I deleted my Tuber Simulator App so I can download the updated one.. (I can't update it because my phone has insufficient storage)

I downloaded the updated one.. And I need to go through the whole tutorial again before linking my account.
After the tutorial, I created a new channel name because it asks me to.. So, I did. Then it asked me if I want to link my account. I accidentally clicked yes..

Now I can't restore my old account anymore.. *cries*