If you bought it from someone then you have been tricked as I am the original owner of Slark account and I never sold it and never will.
I am afraid that you will never get the money you paid for the account back - from the so-called seller aka hacker.
It would be the best if you could simply return my account, as I am nothing but a victim of the hack.

I am surprised that you never verified the ownership of the account by searching BTC address posted in the past by 'the owner' from whom you bought the account and asked him for a signed message.