Sorry for your situation and it sucks but they did everything legally they are supposed to do. Spending energy to try and shame them, feels icky to me.

Having a number of acquaintances in animals rescues and shelters and volunteered in the past at shelters, they are completely overwhelmed but they made a call to an old number and waited the mandatory hold period of seven days. Seems like they did what they are supposed to do.

A shelter is on a streamlined budget and understandably does have their marketing database connected to their adoption database. Nor do they have monies or resources to chase down every one....these places are swamped with many responsibilities.

You are not going to like this but your attempt to vilify them is just not right. The way they are handling your requests, might not be the most customersl centric but you made the errors not them .

Also losing an adopted cat might also place you in a spot where you may not profile as an ideal owner anymore.

I would say drop it. You learned a very tough lesson which really sucks but always know who owns the animal control contract for your town and be aggressive in your search and let them know immediately, let the local police know and put signs everywhere. Lastly, keep contact info up to date.