Riverhorse Valley customer service is shocking!

I have been trying since the beginning of this month to get a tax invoice from the Riverhorse Valley branch in KZN. Like usual, I am getting the worst customer support (we have a Merc truck) which has become a norm for this branch. I then escalated it to the manager, who himself has done nothing to help. It is like banging your head against a brick wall dealing with some of the staff there. Highly frustrating!