First, don't trust your pH test results when the pool is at shock level.

If the Sodium Carbonate is coming through the returns, you have a filter problem already.

The colors for the TA test change when the chlorine level is high. The color change is what's important, but you really don't need to worry about TA until you get the rest of the mess cleaned up.

Run the pump 24/7, but you should consider opening the filter and inspecting the grids for tears.