NO RESULT when calling or e-mailing

I contacted the card division in December already - calling, e-mailing about a very old account of mine. What I want is a letter that this account is closed. I am still waiting. FNB home loans wants this letter from me to clear my profile. The irony is that I can't help/respond to FNB, as FNB won't help me with this letter. I call and call, I e-mail to fnbcard divison - NOTHING. WHO IS GOING TO HELP ME WITH THIS PLEASE - THIS NEEDS TO BE ESCALATED. Please can someone WITH AUTHORITY contact me on my cell? I AM SO DISAPPOINTED IN FNB, AS I AM A CLIENT. BUT APPARENTLY NOBODY CARES!!! PLEASE TELL ME, FNB, WHAT MUST I DO......?????? HOW AM I GOING TO RESOLVE THIS, WHEN FNB IS THE ONLY OPTION, THE ONLY OPTION, THE ONLY OPTION (repeating this to highlight my dilemma) TO SOLVE THIS???