FNB withholding my money from Foreign Investments

I have saved some money to invest in different markets. I worked for that money to invest so that I can have other income inform of interest and dividends and gains because my salary is not enough to cover me and extended family. Now that I am starting to make some extra money from foreign investments of which I pay tax on, FNB is refusing to deposit my money in my account? I paid everything with my salary knowing that some money will come in to cover the rest of the month. I don't understand why FNB is blocking my money. It's my money and it has nothing to do with FNB. All they're supposed to do is take the abnormally high bank charges they usually do. Now I don't have anything and have to borrow money. I feel bul****. Its like FNB doesn't want me to make additional money except if its through them and that's just impossible.