Any recent communication with Cemoil, Inc?

I would like to know if anyone has had recent success reaching anyone at Cemoil Inc (Cement, OK)?

They purchased operating rights to an older well drilled on my mineral acre rights in Grady County. After several unsuccessful tries to reach them by mail, phone, email I engaged an attorney who was successful getting them to pay back royalties plus interest through June, 2025. I tried myself again this year by sending them a certified letter; I have not received any response. I would appreciate hearing if anyone else has had success reaching them. Nathan Bloch