Sorry this happened to you. The whole group of the is a money machine. You should post a warning post with a link to his sites. The only way these guys will ho away is when they stop having customers. But, as P.T. Barnum said...
From a brief text exchange with him, I’d say Serrge is just another one of the sraightish-squeamish Russian guys who want you to pay, DIY, & get out.
https://rentmasseur.com/Serrge