I need to pay tax in 72hours to withdraw.

I was introduced to GTI markets by an online friend and registered and made a deposit. The first deposit and withdrawal were fast, but the second time I tried to withdrew money i was asked to pay 20% tax in order to withdraw my money.
After i paid the money as requested, customer service said that the amount i paid was incorrect and i needed to pay again, and that if i don’t pay the tax within 72 hours, i would not be able to withdraw my money. However, a class action lawsuit approved by AssetsClaimBack/ com resulted in my funds being returned. This is obviously a scam stay away from GTI Markets