FNB double charges, ignores plea for help

For months i have been trying to get an answer regarding double charges on my credit card. I either get no response, or a standard response that does not answer my query. When I reply asking for clarification, I get ignored. This is the worst service I have ever experienced from a bank. It has been MONTHS and still you refuse to even give me the time of day. Is there absolutely no one interested in any kind of customer service at FNB? How can you evade questions about double charges? Its blatant theft!