Your pH is fine at 7.7 but if you do verify that your alk is indeed very high, you'll need to use some muriatic acid which will lower the pH along with the alk. You'll then aerate to bring the pH back up and repeat the cycle until you get the alk where you want it. You can read more about lowering alk in the Pool Solutions guide at this link:
http://poolsolutions.com/gd/lowering...p-by-step.html (Don't worry about alk right now, though. Clear the pool up first.)

And, as far as your CC being 0, that is great! You want it to be 0.