You should write to Tesco, I used to deal with them a lot in my old career, they are very considerate, explain that due to the situation and the weather you ended having an accident being a regular shopper there and you may not shop in there stores again, highlight that you are considering writing a blog on CCUK outlining your disappointment or that you already have, guarantee you get something for it, will be worth the time writing a letter as they have a standard amount they give to protect there rep (more than my weekly shop in value for a home of five ;-)