Extremely furious and very unhappy FNB client

FNB conveniently cancelled my credit card without notifying me. Being a private banker with an excellent credit rating and my personal banker did absolute nothing to rectify their mistakes. No manager has tried to contact me to apologize or explain what is going on or how they will fix the error. I am contemplating closing my businesses with FNB and go to a more competent bank that take me and my business serious. I am furious with they manner they handled my complain without the consultant giving me a satisfactory answer as to when this problem will be resolved.