FNB business banking - nightmare

Since day one with FNB business banking - it’s been a nightmare. Got my business debit cards, been paying some basic items over the counter with it and although my online has been activated I cannot buy anything online (within my limit). The annoying part is that if you try to report it to FNB, no one in the entire company seems to understand who needs to deal with this issue and more importantly how to resolve it. Let me say that again. I have a FNB card and all I want to do is pay for something online (inexpensive item) within my limit. Is that not the core purpose of the bank? Been on hold for an hour explaining my issue to 6 different people. Any help would be appreciated please as your call centre (online as well as business) does not seem to know how to get my bank setup to make a purchase online.