Based on what I have read on this subject, it is all over the place with CVS. In some cases, complaints of rudeness, mis-communication with doctors or insurance companies. A lot of them were from complaints from the person's insurance company that put restrictions on the types of drugs they would cover or limits.
If you believe in fact that this should be a class action lawsuit, then talk to a lawyer. Believe me if this is a valid class action, you will have them lining up, with the "smell" of money. But if not and they don't want, then they know it is a loser and wont even take it.