Pathetic service from postnet employees. They don’t want to do their jobs

Around 3pm today my mother went there to collect a parcel I had sent and when she got there, the guy that was at the counter refused to help her ..he told her that they had received many parcels and she would have to come back another time. What bull?! She wasted transportation money for such treatment. I am so frustrated and disappointed. That was the last time using the services