Swiggy — rude and illiterate delivery boys

I had ordered for ice cream from 2 different places. I had given my complete address including my building and flat no. Theres an option to give landmark as well. Now what exacty is a landmark - a place which is very close to the address building. I had given a landmark as a bus stop which is right in front of my building. The boys who came to deliver kept on calling me and without listening to me completely kept on hanging up the phone on me. They came after a few mins and started arguing with me rudely telling me that they are not from around. So is that my mistake that they do not know the area? They were outright rude.
What a ridiculous experience to call anything from swiggy