HOW TO SEND MONEY TO WEST AFRICA

My father has been living in Brazil for  years now, he used to send my school fees through western union and moneygram, but the last couple of months he went to Manaus to send money and they told him he can't be sending money to Africa, there was a connection/network problem in sending the money through western union or moneygram, I was wondering if there is a way he can send money online using credit card through western union or money gram, is Brazilian credit card accepted by international companies like western union and moneygram, the manager at Manaus western union office told him he has to do it online by using his bank account at the local bank to transfer the money through western union, can someone help please? I have been home waiting for some solutions to help him