Checkers just blindly robbing customers

The Checkers Hyper in Vanderbijlpark does not know what anything costs. Today I bought Waggies 8kg Senior Dry Dog Food, the price listed in store is R139,99 on special but shows as R149,99 on the website. However, when I got home and checked my slip, I saw that I paid R189,99 for that very dog food. This is not the first time this has happened to me when shopping at Checkers. I am not sure what game they are playing but they are robbing their customers making me want to take my shopping elsewhere from now on. They should really get their act straight.