No response regarding bond cancellation

Hi

I am very frustrated and disappointed with the lack of service and response received from standard bank, after calling the call centre numerous times and being transferred from pillar to post, we have received no explanation for the additional "other" fees and interest charged, when we gave more than 3 months notice of cancellation of our bond, as a result we cannot move forward with the process and no one at standard bank is able to provide answers. We are rather being told there is no one to speak to regarding our questions, which does not make sense.