I have visited this place to get a kitten. I have ...

I have visited this place to get a kitten. I have found a couple kittens there and I fell in love with a kitten I did all the paperwork they have asked and told me to come pick her up in 3 days she's in treatment. Call us on the 3rd day. When the 3rd came I called and they told me she's being adopted already. First come first serve. Why would you tell me to adopt her on the 3rd day? Why would you trick somebody? Very disappointed!