FNB Card blocked yet notifications of incorrect pin received

So my cheque card is current;y blocked (I did this due to suspicious activity) yet I am still receiving notifications of incorrect pin entered. Only one card is linked to my cheque account and that is the card which I have blocked. So i tried to call the number listed on the FNB online banking site - doesn't even ring, just beeps and cuts me off. Now what? I am at work, not trying to use the card which I have blocked, and can't get a hold of my bank either. I constantly have issues with FNB, despite friends and family saying they never have problems with FNB. Anyone with suggestions for a bank with better service and where my money will be safe, please comment.