Poor service from Finance team

I have been granted a subsidisation as a widow of my husband's pension fund. This subsidisation was backdated to 1 April 2015. This means that my account should be adjusted with the subsidised amount from 1 April 2015 and I should be refunded for that period. I submitted the letter and the proof of subsidy, however the Finance team have incorrectly calculated my refund. I should be refunded the full subsidisation amount for a period of 1 year as per the back date, however they have closed the file refunding me only R505.00.<br> <br> This is ridiculous that I now need to contact Bonitas again and explain what is required. I have been on hold for 24 mins during which time the call centre agent only spoke 5 minutes putting me on hold for the rest of the call. Why is a simple matter so difficult for the business to understand. And why can't something be done correctly the first time..