It can be very frustrating when trying to get your cat to eat new food. Our one cat will only eat 1/3 of his meals as wet, and that's a compromise we're OK with.
Have you read this article? It has some helpful advice.
Yes , it is very frustrating when you have a cat that is not keen on wet food .. I have two .. They will eat it for awhile then go off it . I always keep their favorite kibble for back up ..