Text Mail Subscriber

Not sure if I posted my question in the correct area? I received 2 text messages that said, “Your call text email subscription is unavailable, please leave a message”. These 2 different numbers of people are sending pictures with sexually explicit text. I didn’t know anyone would send me something like this I blocked my number when I phoned these 2 numbers back and got no response. Is there a way to find out if those numbers are correlated or, can you recommend something I can try?
These people i used to go to high school with that i now have college classes with. It is far and away the biggest cell phone scam costing the industry an estimated 150m a year and causing untold anguish to the victims. Someone from stewardessstrong text Minnesota us posted a whisper which reads does anyone know what text mail subscriber is