Hth not a trusted label for pool care

I am fed up now, since I bought hth float from checkers a fee months ago, the float grows in my pool, from a 10cm cube to a 30cm overnight. I complained and someone responded, 1st it was wrong product, then they give me another suppose to be better, it's got worse, then they collected it and gave me a liquid for sparkling pool. Guess what, I bought a 3rd one from checkers and wala it's doing the same thing, I have pics for proof. So excuses upon excuses we customers are being use like guennie ***s to sample their product.. My swimming pool pump is affected as it doesn't work like normal and I told them if my pump packs up I am going live on social media.