Fnb stop blocking my online international purchase

This is my 5th month having same issues with fnb and when you call I got to be transferred to more than 8 people. Why is FNB keep on blocking my online International purchase. I run my business using social media networks like Facebook and each month I have to pay facebook but I can't because FNB always close block my international online purchase, Please FNB open my account for international purchases I have 4 accounts with fnb and you have blocked all and businesses is not moving and I pay almost about R1500 bank charges every month for using fnb and you are treating us as such.. Or you want me to take my business somewhere else