DTDC Courier & Cargo — Rude behavior of courier agent

I have ordered 3 potted plants which were supposed to be delivered via DTDC. The courier agent called me and refused to deliver at my doorstep, which is 3rd floor apartment and instead asked me to come down and take the products from his convenient zone. Mind you it is late evening at 7:00pm and I'm a female. Since the items were quite heavy for me to manage alone I insisted him to come to my 3rd floor via elevator. To which he threatened me of delaying and cancelling my prepaid order if I don't obey his instruction. This is extremely rude and inappropriate on the part of the courier agent and I want strict action taken against this person.
Delivery ID D[protected]