Paytm Mobile Solutions — wrong item delivered nobody responding

Address:

560103

I have ordered nikon camera with below description, (Nikon d3400 d-zoom kit (Af-p dx nikkor 18-55mm f/3.5-5.6g vr + af-p dx nikkor 70-300mm f/4.5-6.3g ed vr) 24.2 mp dslr camera (Black) + bag + 16gb memory card,)

But after delivery i have got only camera body and 18-55 mm lens, they not provided not 70-300 mm lens and memory card along with it, return policy is available still i am not able to click return button in it, and nobody receiving call from paytm and seller partner, i have video prof while unboxing the delivery