Several weeks ago I earned 100 favors and misc coin. I didn't receive the favors or coin. When I reported this to Zynga support, they said, "It cannot be verified" and therefore there was nothing they would do to help me. I accepted this because favors are usually earned not purchased. I knew I could earn more, and I did. I as still having fun.
It happened again when 100 farmbucks disappeared from my account about 10 days ago while I was at dinner. First zynga tried to prove that I spent it myself, they couldn't. When I asked them to look at my account and compare the US dollars spent, with farmbucks earned and spent and the virtual dollars spent they told me "it can not be verified". They claim that they are unable to track what happens to my real US dollars or farmbucks (purchased with US dollars) once they have them in the game.
Because they have control of the game the only thing I can prove is that I spent money and then complained that it was stolen within the game. The 100 farmbucks were mostly purchased, some earned by joining the Disney Movie Club for farmbucks. Farmbucks that appeared and disappeared in a matter of hours when I wasn't even playing the game.
My husband is witness to the arrival and disappearance of the "unverified" farmbucks. This has ruined the game for me. I will never play another zynga game. I no longer care if I get my money back. I just want to tell anyone who will listen that zynga steals from their customers. If this isn't illegal it should be. It is theft, pure and simple.