Stuck in a moment (in my coat)

I bought a new winter jacket at the beginning of January. I decided that I'm tired of freezing my rear end off and I further rationalized that I hadn't purchased a new coat in many years, I'm outside a lot, etc etc.. so clearly it was time for a new (expensive) jacket. This jacket has (thankfully) proven to be quite warm, but has also caused me much frustration in the form of the bottom zipper getting stuck (there are two so that it can open varying amounts from the top or bottom). I learned quickly how to gently pry away the material that gets caught in the zipper so that I free myself from my coat.
Today, I went to zip up my jacket (it is still freezing outside despite the calendar arrival of spring), and the pulltab attached to the top zipper snapped right off. "No problem" I thought, as I pulled the actually zipper piece up to my neck. When I got home I discovered that I could not unzip the top zipper. I tried a variety of different manoeuvres, but escaping from the coat by removing my glasses and then pulling it over my head seemed to be the only way out. Fortunately, I was heading out again shortly thereafter to a destination down the street from where I had purchased my coat. I went back into the store and demanded that they figure out a solution so that I need not be trapped inside my coat. The saleslady said "no problem" and promptly produced a new zipper pulltab, attached it to my zipper and my problem was solved. I was tempted to ask for a spare but figured that I'll just try to be careful.. after all, winter can't last THAT much longer.