Capital First — I'm complaining about the extra charges applied on my loan account

Hi I had applied for a personal loan in capital first which paid fully but I have been charged extra regarding the late payment and cheque bounce chargers. these all charges have already been auto deducted from my bank account, still it is showing as an outstanding payment of 3155/-
I would like to speak to the head or manager for the capital first loan. i have already paid my bounce charges multiple times. it has been auto deducted from my account always. Kindly help me with closing this loan. I will not pay any additional charges anymore,