Diploma

I have submitted my work duties and I received the respond that my practical experience provided not sufficient However I have re- submitted my duties again and there is no respond. I don't understand why I don't get my diploma because I am working at the bank and my duties corrospond with financial management that I did. First ***-7 Second ***-12 Third ***-5 NB: I submitted my duties second duties in April this year at brakpan College. I send the email more than twice to ***@za and even today, there's no feedback.