FNB business service rapidly deteriorating

FNB has brought our organisation to a stand still. Our new business bank card has been delayed twice and now international services we pay for have lapsed and we can no longer use them until we have our new card which we've been waiting weeks for. On top of that FNB have blocked our organisations emails so we can't send documents to add people to our business account. I've called 8 times, spoken to 13 people (passed from pillar to post as no one knows how to escalate the issue, and doesn't want to deal with the problem), lodged 4 formal complaints through the FNB website, did 4 FB posts and now we're still getting emails not phone calls from FNB, which we can't respond to.