Waterproof Hiking Shoes

I bought a pair of "waterproof" hiking shoes from Zando a week ago. After enquiring about a different pair I was told that pair is not waterproof I thus specifically opted for the pair that is advertised as waterproof. However on wearing it the first time my feet was soaking wet and it was not even raining, I was walking in grass filled with overnight dew. You can imagine my frustration and anger. When I contacted Zando on Facebook messenger they told me a day later that I cannot return it as I've worn it and they explicitly told me that it is not waterproof. However they were referring to the pair I did not buy, making no effort to go into my order history otherwise they would have known which shoes I was refering to. When I corrected them and sent them a screenshot of the pair that I did buy which was and still is advertised on their website as waterproof they never answered me. I followed up a few times to no avail, they are just ignoring me. When I phoned their customer care line on 31 July 2018 the agent told me that the Facebook chat people just informed her that they are communicating with me regarding the matter. However I corrected her that I am indeed communicating with them they are not responding and I am still waiting on a resolve to this matter but Zando has just gone very quite.