DTDC — Extremely pathetic and disgusting service

I work for a company where couriers are frequent. This was my experience when my friend couriered me a document from Pune to Navi Mumbai.
He couriered the document on a Tuesday afternoon and they told him that it would be delivered on the following Thursday morning.
Thursday came and went. On Friday, I called them in the morning and lodged an official compaint with DTDC Head Office, Mumbai as the courier was extremely urgent. They promised me that I would get it by that evening.
I waited till the evening and called the customer care twice more. They responded okay, but it was obvious that no one had any idea of where the courier was. Their internet search engine said it was at Vashi, Navi Mumbai.
I called the Vashi office on both their numbers at least 20 times in the day. No one ever picked up. So I called the customer care, and the person called up the Vashi office, and this time someone did pick up. He said very coolly that it would only be delivered on Saturday. I told him that Saturday was closed at my office, and he actually said very rudely that I must work in some low class office where Saturdays were not half days.
So, I went on Saturday morning myself to the Vashi office. They were very surprised, and I asked them to just hand over the courier. After searching for one hour, the person told me that it had been misplaced. This made me so angry that I told them I was lodging a complaint with the Consumer Court and another with the Vashi Police Station. This made him panic and he told me to wait a few hours while he searched. So I went home.
In the evening, he called me up and told me that the document had been found. I did not trust these any more, so I told him to deliver it on Monday morning.
Monday morning came and went. In the afternoon, I called the person on his personal number again. He very coolly says that it was my fault that I did not receive it, because he was waiting for me to come and pick it up!
This time my Pune friend got into the action and lodged a complaint in the Pune station. This worked, because now the guy himself came rushing into our office and gave it to me. He did not even apologize, but had an expression as if I had tortured him.
What a bad company, and what terrible service. I will definitely never do business again with DTDC.