i was scammed

i was introduced to this platform by my friend in 300 level in the univerisity due to my financial difficulties i joined the platform my friend told me it was free but after i joined i was asked to pay some amount of money for my registration to be processed i payed the money three times but after paying i was immediately blocked out of the app and all traces of our discussions were deleted i lost close to 50,000 in this endevour