Sorry to hear that. Believe me, we feel your pain, an un-fun lesson to learn, and many of us here went through similar troubles when cloud-based services died in the past.
But as @sidjohn1 notes, that's why a lot of us are are here on Hubitat (local-control focused), and there are many switch and button options that don't rely on the cloud that work w/Hubitat. Switches (Zooz, Inovelli, GE/Ultra Pro/Jasco, etc.) are pretty easy to find, and below are a couple fairly recent topics on button options w/useful links...folks do seem to like the newer Ikea buttons (Somrig) w/community Ikea drivers that are available here.
