Hi STS;

Welcome to the PoolForum!

Do this:

#1 - Disable your timer and run the pool 24/7 till you've gotten the chemistry adjusted.
#2 - Add 1# of Power Powder + (calcium hypochlorite) in the AM.
#3 - Return the "Fresh n Clear" (non-chlorine 'shock'), get the test kit as planned, and have your stabilizer level tested.
#4 - If your stabilizer is low, let them sell you some stabilizer. But get the MINIMUM amount, because you need to use up your tabs, which also add stabilizer.
#5 - Buy a few pounds of dry acid to lower your pH some. (You can switch to muriatic acid, later.)
#6 - Get a cheap floater for the tabs -- the Hayward feeders often don't work and you need a back up.
#7 - Do NOT buy other goop from them.
#8 - Clean your filter, and then add the stabilizer when you get home.
#9 - Put some tabs in the floater and put it in the pool.
#10 - Add a recommended minimum dose of acid.
#11 - Test the following day and report results, BUT if chlorine is less than 2 ppm, add another lb of cal hypo.