Firstcry.com — courier issue

I have ordered the pamper baby dry dipars from the first cry app.in that order i have mentioned the clear address at where you have to deliver the ordered iteam. But the issue is that courier agency (Dtdc courier agency) told me that we are not deliver the iteam. Why they are telling me that they will not deliver the iteam. Please solve the issue or if the agency is right then why this order has been submitted. I want my product at my mentioned address. My contact number is [protected]