money that disappear from my account at FNB Jeffreys Bay branch

I query the R6200.00 that went missing on my cheque acc, however ***** dept refuse to pay my money back while the card was with me in my wallet. The manager from my local branch in jeffreys bay contact me and refer me to the ombudsman. i phone a couple of times with no reply and draft a email to them the time my money was stollen and after the manager phone me. till today no reply or email from them . Tell me what am i suppose to do because i'm not insane to ***** my own money. R6200 is not R620. I think its very poor from the FNB group not to pay there loyal customers there money back.