I have not seen such a slow courier service ever. They make you wait like forever to deliver your product to you. Dtdc they call themselves as express courier service, but I don't think express means this for sure. They delivered my mother's birthday gift 5 days late.
And you have to call again and again to keep track of your product as they hardly update the tracking details online. These days every courier service provider gives you tracking I'd and link to keep track of your order.
Anyways my experience was not good with dtdc courier express, may be yours vary from mine, but be careful while using this service.