How do I load my Payoneer GBP balance to my main Payoneer USD account ?

My main account is in USD & I have an active Payoneer card for USD account, now
I got some funds from peopleperhour as GBP, now, how do I upload that fund on my Payoneer card in USD & use it.

These days,with one Payoneer account you get three currencies account USD,GBP,EUR, u know that right ?

Let me know.

Thanks!