Not owing up to your sale price

I was pretty disappointed when I went to the app and it said that it was on sale in Canada for $4.99 and I got charged $7.99 for it... the information stated that the sale price was good until May 3! That is the date that I purchased it.... I just fell if you are going to put apps for sale then honour your price! And it is really nice to know that there is somewhere that you can dispute this! NOT

pljhg about 20 Minute Meals - Jamie Oliver