Hello there and sorry for the troubles you are having with your Pac Boots and customer service. We go to extraordinary lengths to try and provide the best customer service possible, but sadly nobody bats a thousand. It seems we may have missed our mark here and my apologies. If I can help in some way, please feel free to PM me. As for the pac boots, I hope this helps:
As with all pac boots on the market, ours are not advertised as being 100% waterproof like our mountain boots are. Stitching areas aside, leather by itself is not a waterproof material. But as others have already stated, when treated and cared for it can be highly water resistant. Pac boots are just not designed to stand in water like a membrane constructed mountain boot or a neoprene boot. But if they are well cared for and treated, then short creek crossings or puddles here and there shouldn't be a problem. Pac boots are better suited for cold weather, snow, etc..
We recommend using Pitch blend dressing on our pac boots, putting emphasis on working it into the areas where the rubber meets the leather. This will both condition and "seal" the leather. Helping it repel water and prevent it from soaking through. The only thing we steer clear from is SnoSeal, as we have found that it rots the leather over time which will make them leak.
Hope this helps - Matt