Unhappy client!!

I bought the polaroid watch at dischem sea point under the impression that it works almost like an apple watch though not exactly the same. The back of the watch says water resistant and there is a swimming sport mode there. I swam with the watch thinking this is water resistant as per engraving on the back of the watch. I tried to return the watch for a refund or replacement and this was denied?! They say its water proof not resistant?! The device and the terms and conditions surely are contradicting each other and i as the customer has to suffer the consequences? Polaroid SA please do better!