The fact that you have CC=2.0 is not good.

You need add muriatic acid till the pH comes down. Read http://pool9.net/ma so you can handle it correctly and then add acid, a gallon at a time. Make sure the pump is on while you add the acid, and for at least 2 hours after. Continue to dose with gallon doses till the pH is 7.8 or below.

For a 100K gallon pool, with CC=2, dose with the dichlor at the rate of 1/2 gallon (about 5 pounds) at a time.

?'s:

1. What does the water look like? (clear/cloudy/opaque; blue/gray/greenish/dark green; odorless/chlorine smell/swamp smell
2. Are you running your pump 24/7?
3. Have you opened and cleaned the filter this season?
4. Can you purchase 100# drums of calcium hypochlorite?

Please explain these dimension:
Size 260"x260"x272" pool 96" spa
260" = 21' 8"
272" = 22' 8"

5. Are you saying your pool is a 22' cubic hole in the ground?