Bummer!!! I have never heard of these inks, but just checked and see their inks are called “Demon Drool”, “Spider Spit”, and “Swamp Dew”, and the free sample size of 1/4oz is about enough to 1/2 fill a cartridge… It sounds like the free sample may have caused damage to your printer (or it may just your printer’s time), so it may or may not be possible to clean/fix. I don’t see any helpful support on their site, so not sure they can/will help you after experiencing problems after using their products.
It this was my printer, I would contact the company you got ink/carts from for support, then flush the print head a few more times with PiezoFlush, and maybe install a set of PiezoFlush filled carts in hopes of getting all the channels printing well again.
Best of luck to you!