Cancel funeral policy

I've been with FNB for many years and the level of frustration I have at the moment is so unnecessary. It's only a few rands per month, but I don't need to or want to pay it anymore and I've been asking for cancellation for months!!! I've sent numerous emails and have asked not to phone me because I can mostly not answer and still no joy. JUST CANCEL THE DAMN THING and mail confirmation thereof!!! With all your technology, is that too much to ask???