If your cat is finicky and refuses to accept the new food, you'll need to start by feeding scheduled meals rather than feeding your cat free-choice. You should plan on feeding your cat a meal two to three times daily and removing any uneaten food after 20-30 minutes. Start this process while still feeding the old diet.
There are lots of reasons you may desire or even need to change your cat’s food. Your cat may have developed a medical problem for which a special diet is recommended. You may not be able to obtain the food your cat has been eating any longer. Or you may simply want to change your cat to a higher quality food. I will advice you seek a vet advice.
Transitioning a cat from a dry food to a wet food can be especially problematic. The taste and texture of the two types of food are quite different and many cats will find their new food quite strange. There are some tricks you can try to make the transition easier and the food more palatable. Try sprinkling the kibbles on top of the wet food until your cat is used to the smell of the wet food underneath.
I have been there too. It was very annoying frustrating. But is what I did and it worked. Try mixing the dry food into the wet food. You can also try grinding some of the dry food into a powder and mixing it into the wet food to add flavor and make the food more palatable.
I'm sure it will take few days and your cat will get used to the new food.
I believe encouraging your cat to engage in interactive play for a short time (15-20 minutes) before each meal can also help increase your cat’s appetite and make acceptance of a new food easier. Also i will advise you watch your cat’s weight carefully during any food transition. If your cat loses weight or refuses to eat during the transition, consult your veterinarian for advice.