Ecom Express — Delivery services provided by ecom express

I have order a knife from snapdeal and it’s been put through ecom express to deliver it to me but instead the delivery service provided by them is unethical and worst human behaviour
Mark this these delivery personals they don’t come to your door to deliver / not ring the bell or knock on you door on the specified address
They don’t provide no prior notice on what time the delivery would be made all they do is call from a unregistered phone no which you cannot make a call back
Even when I attend the call they dont wish to speak and mark the delivery as unsuccessful and would cancel the delivery
This shows lack of training to delivery professionals and worst customer service
I’m highly offended by this I would take this to court if I can and teach these guys a lesson about customer is god!