I bought 80 primroses in plug form and when they matured, at least 50% were blind and had no flowers. The ones that flowered were perfect. Tey were brought up in a cold greenhouse.
Here is an extensive article on this problem: http://www.hdc.org.uk/sites/default/files/research_papers/PC%20105%20Final%20Report.pdf
If you are not satisfied with the performance of the plants you ordered, you should certainly take it up with the grower and/or supplier.