India Post — non delivery of international post

Address:

Kutch, Gujarat, 370001

To,
Whome whome it may concern,

As per subject line, Recently i have purchased cellphone from international merchant online, i have paid Amount in advance and they sent me Parcel via Belgium Postal service and last update i got from their parcel tracking service was "Parcel has been handedover to india post and will be delivered to coming days." via untraceable category. as per attached photo merchant sent me Parcel on 6th NOv 2017 and now its 50 days of transit.

so how do i get my this important parcel ?

Thanks and Regards
Jayrajsinh Vaghela