Maruti Air Couriers And Cargo Private Limited - Package not delivered

Had couriered a package on June **. Was supposed to be reached to the destination on **-**th of June. It's been over a week now and the customer service has stopped responding to my calls. And if at all they pick up my call, they tell me it will be delivered the next day. I have been trying to contact them daily for a week regarding the same but it has gotten to my nerves and I need a resolution. The main respose I get is that the delivery location is not serviceable but when I asked before shipping, I was assured that it would be delivered