fnb worst service ever so annoyed

I called fnb yesterday to put a stop order on my dstv but I never happen because there system couldn't verify my me it asked me enter last 6 digits on fnb card so I did but it said incorrect number of digits entered . Fnb denies their system is broken and kept making me enter over and over again I wasted 15-30mins of my time with them yesterday.they suggested I use my cellphone banking after that but another problem occured I'm so sick of the lack of professionism here.