Continuous spam calls FROM MY OWN BANK

We are at our wits end with FNB and are looking into switching banks. For the last 2 weeks (and even before), I have been hounded with calls from FNB trying to sell me some or other service. On a few occasions I have told them to please stop calling me because I am not interested. When I told the 1 lady that I am not interested, she does not say thank you and end the call...she comes up with all sorts of objections and starts again with "yes, but". I just ended the call. If a customer says no, LISTEN TO THEM. This did not stop there. Again I was called incessantly and I just kept ignoring the calls. Yesterday morning someone phone me AGAIN and I ignored the calls. Then this woman had the audacity to call me ON MY WORK PHONE and try to sell me ****. I AGAIN explained that I have told how many of their staff members that I am not interested and that i do not appreciate being called at work. THE EXACT SAME THING HAPPENED AGAIN THIS MORNING! I received 2 missed calls from FNB. I eventually gave in and called back. I explained to the situation to the lady who answered and guess what her response was? "Then just ignore the calls". What the hell kind of customer service is that?? I told her why on earth should I ignore the calls, how about they just stop phoning me...and I put the phone down. She then phones me back ON MY WORK PHONE AGAIN! As soon as I heard it was her, I put the phone down. Seriously FNB...enough is enough. My husband and I are now looking at other banks to switch to. Well done on chasing your customers away!