First Flight Couriers — shipment delay to much

I've ordered electronic good from dhanbad jharkhand 20 days ago 18 april. When i call first flight courier they keep on telling that first flight courier workers are on strike so the parcel you ordered will stop at any sorting center. Now what to do in order to get that parcel to my home?
Personal no [protected] and pincode 416003
They are just taking too much time and annoying customers by going on strike and not performing shipping duty. If they are on strike they would have transferred or tie up to other courier service that would help all the first flight shipments to reach person to person on time without delay. Myself and other people ordered expensive goods that are now on hold and don't know when they will reach us. Strike will ultimately harm the courier or close the service in india as if the shipments didn't kept with safety then that would be a great problem the company.
The seller didn't provide me with tracking instead he given package with the first flight sticker with barcode my address my phone number and pincode 416003