A disappointing experience

I am dissatisfied with the customer service of my bank. I am a customer of the National Bank of Abu Dhabi. No matter how large my bank may be, if I don’t get what I need, my financial activities are heavily affected. I am a savings account holder and also have taken home loan from the Home Loan department of the bank. For this, I pay regular monthly Instalments (EMIs) through Post-dated check systems. This time, when I submitted 12 months of advanced PDCs, somehow, the PDCs for the last 3 months were not approved. I raised this issue with the customer support; I was not given much of attention and after waiting for nearly 3 hours, I was told I had to submit the PDCs again otherwise an outstanding interest would be charged. This was an extremely disappointing experience.