Obviously, by now you have a test kit.
I'd start here:
Bring the PH to where it needs to be.
Then add chlorine to get on the high side of the scale.
Then use an algaecide to kill what's in the pool.
The next day, hopefully most of the gunk has settled to the bottom. Then check your chemicals again, and if you can, vacuum your pool into a waste location other than back into the pool.
You should see some progress. When you get the pool clear, and you've met all the specs you can with your test kit, then have your pool tested at a pool store, and see how you are doing and what you need to do to finish it off. Be prepared for high phosphates.
The bottom line is to kill the gunk, let it settle, vacuum it out of the pool. Diluting the water is a good thing because your phosphates are probably really, really high, so that's more $$
Personally, I'd drain it and BTW, first check that your main drain cover is of the new type (won't entangle hair). If it's not, bite the bullet and replace it. Then lastly, scrub the pool walls with chlorine, then refill it. A pump at Harbor Freight is ~ $ 60.00 or so.
Depending on your options, algaecide + acid + chlorine + shocks + plus phosphate remover + CYA + + + It all adds up. If you start fresh it may be cheaper in the long run, and you will not be fighting an expensive battle with money as your main weapon. The pool store will be glad to finance your fight on your credit card.

. IMO, your money would be better spent on fixing the hardware.
That's my .02