Just got blackmailed

Through a sexting group here in Reddit with a follow up on telegram. They sent me a screenshot of a post ready to be posted where there were my name phone and pics. Post said that I had sent photos to underage girl. I blocked them instantly, sent a message to the notoscam on telegram, mail to telegram, mail to the police, stopNCII and searched on tineye and google images for my face. Nothing and it’s been 2,5 hours. What is the possibility singing gets posted and how can explicit photos be uploaded on social media ? Isn’t it banned? Should I do anything else? Thank you so much