Terrible customer service

I was sent a medical tax certificate which contained incorrect information, I called *** on 22-10-2015 I spoke to Lerato & explained the query. I told her I need a new one with correct information she put Me on hold for 45 minutes while she spoke to her team leader, she then said to Me that she has to forward this query to another department & they will only be able to sent Me a new certificate after 1week I explained to her that the last day for submission of income tax is 27-10-2015. I received no feedback so I called the same number 30-10-2015 & spoke to Mungisi Mazibuko I gave the reference number from My first call He found the query but I still had to explain My query again, than He said the other department is still working on it than He put Me on hold & spoke to his team leader after a 30min call will no resolution I asked Him to please call Me back because the dead line for submission of My tax return has passed & I will be charged penalties for late submission. He promised to call Me back before the end of business that same day but He didn't. I called again & spoke to Taryn on 26-11-2015 & started from the beginning she also promised to call Me but didn't.