If you don't want to get your cat anymore and can't find a new owner to adopt it, here are a few things you can consider:
Find a local animal rescue organization: Many cities have animal rescue organizations that care for stray animals that are unadopted. You can send your cat to these organizations, and they can provide your cat with food, medical care, and a new home.
Seek help from a veterinarian: If your cat needs medical attention, you can ask a veterinarian for help. Many veterinarians have their own clinics or hospitals where they can take care of sick animals and find new homes for them.
Find a local pet store: Some pet stores may accept cats you don't want to have anymore. They may find a new home for your cat or leave it in the store as a display animal.
Find a new owner on social: You can post about your cat on social to find a new owner to adopt it. You can post in your local community forum, pet group, or social group, or use a dedicated adoption to find a new owner.
Whichever method you choose, make sure your cat receives proper care and medical attention until it finds a new home.