I completed the assignment and I did not miss any guidelines and I had previously completed same restaurant job before. This time, the food was not acceptable and I rated it accordingly. The company told me I won't get paid because my feedback negatively affected the shop score. Pretty much, the company was not happy the feedback reflected the facts and said the photo doesn't match my feedback. However, it does and even they admitted the food contains many skin parts on the meat. The reason to reject my work and not pay me is nor professional because I completed every part of the shop correctly. I reported the facts and the company was not happy that this time the report was not giving the restaurant a "perfect" score, so they rejected my work. I was not paid for my work, my work was done correctly. They even claim things that the photo does not support. This is a dishonest business.

Beware of Sentry Marketing. They are a legitimate company, but they practice unfair practices. There are so many other companies... don't work for one that doesn't treat us, the workers, well.
I have been a secret shopper since 2003. I work for more than a dozen companies as an independant contractor. I have had a great experience with all of them except for Sentry Marketing. They come up with any excuse that they possibly can to not pay you. Nearly all of their shops include making a purchase, so not only do I not make money for my time and effort, but I loose money.