I went to certify my documents at the Post Office in Soshanguve Block H and was assisted by a very rude teller,she literally threw my documents at me after certifying them

I went to certify my documents at the Post Office in Soshanguve Block H and was assisted by a very rude teller,she literally threw my documents at me after certifying them. I greeted her with a smile on my face so don't understand why she behaved so unprofessional. It's like she couldn't wait for me to leave .