I haven't recieved my parcel over a month now and Parcel says Delivered

I have been trying to get my package for a month now, the only responce I'm getting is they will contact me and when I contact them again, they say they have contacted me while I didn't receive any call from them. This has been on going on for 2 weeks. One agent mentioned that my package was delivered and I have not received the package also

Worse the customer care doesnt even answer or pickup the phones