I've got a pretty old house, but in a good way - prefer old designs. One of the things I bought to go with it was a vintage bathtub.. now I have to say I don't know much about installing this kind of thing myself so I brought in what I thought were professionals.
I think it's fair to say I had all the problems above and more - and guess what they told me at the end? That because I bought a vintage bathtub it was MY fault because they weren't sure on the installation. I then pointed out that it wasn't a literal 'vintage' design and that it was only created to look like one. I even linked them to http://www.vintagetubandbathreviews.com/ to show them what I was on about. Frankly it was my fault, at my age I should know better and do my homework before trust people with such valuable items.
Oh well, still learning at my age