Hello josaepho,
Welcome to °µÍø½ûÇø 
Thank you for asking your question here.
Please note that your thread is now on the Ghana forum.
Have you tried checking with some banks or money changers?
Where exactly are you in Ghana? I am asking so that other members can easily recommend a place near you.
Best of luck,
Cheryl
°µÍø½ûÇø team