Poor customer service, false advertising

I bought a verimark mop for R200 at Game, canalwalk. From day one the mop was not drying properly when you twist it for use the bottom of the mop is still dripping wet, I told my wife we probably not using it properly. However, after reading the instructions it turned out that we were using it properly and I decided to take the mop back to the store where I spoke to Tyrone the Retail Manager from verimark. He said he needs a reciept and to test the mop himself. No problem, I handed him the mop which he dipped into water and dried it out then told me there is nothing wrong with it. I then took the mop from him and dried another 1litre from it to prove him wrong. He then said I need to replace parts of the mop that I will need to pay for keep in mind this mop is not even 3 months old yet). So my question is why do I need to replace things on a new mop. It's ridiculous, the Tyrone guy has no customer service skills at all. I'm sure that every mop such as this one would give the same problem because clearly the mechanism is not strong enough to do the job it was created for. If the mechanism is not under garentee, what exactly is the purpose of the garentee?? A mop doesn't have more than 1 function. We bought this mop to avoid using our hands to dry it, but we are still needing to use our hands.