Try reporting them to consumer rights and make of it a quality issue that they breached the contract when they started sending u bleached and undrinkable water... The contract is already broken between the two of you as they did not provide you with clean drinkable tastless water... So if i were you i'd definitly give consumer rights a call, wonders may happen (or even nothing at all) but i think the latter is unlikely because they tend to take such complaints seriously, good luck and let us know what happens next