Prateek Princekcd - Product not delivered

I am CAT aspirant , i was searching for cat stuff on telegram. I contacted to person name Prateek (username: @princekcd) he took money (rs. ***) and added me in a group named CAT (created by him), for few days it was working quite well , but few days earlier i tried to login to that channel/group, a notice came you are banned from this group, i am not only peron that faced this , there are around **-** more person. even we didn;t done anything wrong, that guy kicked us out , and when i tried to contact him he doesn't responded anytime. I request you to please solve out the matter.