Review Extremely Poor Customer Service

I went to DHL's Haining Rd, location to submit documents for a Visa renewal. The print out from the US Embassy's website indicated that DHL was the courier they use to receive and deliver packages. Upon arriving at DHL, the attitude of both the security guard and the DHL representative were appalling. Instead of calming informing me that DHL was no longer the drop off points for the documents, the DHL staff member was aggressive and unprofessional in his response to me. I will endeavour to never use DHL as my courier because of the service I received.