Ugh, so frustrating.
if on this site, or any other, you are going to put your special contact information and somebody contacts you, at least have the courtesy to acknowledge the contact.
Then you can politely beg off if you are not interested.

And don’t just disappear in the middle of a conversation without telling the person that you’re no longer interested in continuing.
That is just rude or cowardly or both, depending on the circumstances.