OnePlus India — Ordered product delivered incompletely

It has been three weeks since i ordered a warp charge adapter and a charging cable from the one plus website. and the delivery came 6 days later but only the adapter came. the cable was no where to be found. i tried contacting oneplus for over 78 times by now but not a single response either on mail or to the call. The tracking details in the website say both the products are delivered, whereas i have recived only the adapter. Even bluedart ppl confirmed that they delivered just the adapter. i am not even able to work these days because mos tof my work is related to making calls. I am even going to send them a legal notice, as this is very clearly e commerce fraud being conducted by the cheapest and the most dishonest company oneplus