Customer service at it's finest (?)

I know I've talked a few times about the lack of customer service here, but I figured I'd give everyone another example.  After the run on Sunday, I hobbled up to Oxford street to look for a few suits.  I found a store that had one that seemed reasonable.  Found the right jacket size, but couldn't find the right size pants.  So I asked the sales person if she had any other sizes anywhere.  She said there should be one.  I tried on another size and when I came back, I saw her holding the right size but then gave it to someone else.  I asked her if she found them and she said yes, but that she had in fact given them to someone else.  I was so confused at that point, I didn't know what to say.  She told me I could go online to buy them if I wanted.  I guess that's what I get for expecting the matching suit pants to be next to the coat and not on another rack.  I was so blown away by that experience that I put everything else I was going to buy on the counter and walked away.