There are two issues (kinda one) I see here. The pH is WAY to high, there has been discussion here about how Chlorine is far less effective at high pHs. Second, the TA is too high. Is a 1/4 drain and re-fill possible? Otherwise I would search the posts here for lowering the TA (I believe using aeration) and then brining the pH in line as well. That high pH is effectively shielding the chlorine from working.