Delhivery — Package undelivered and untraceable since 2 weeks

I have not received my package yet, it has some invaluable gifts that i can't afford to lose. I got to know from the sender that it got lost in transit however it's not reflecting in my account. It's been 2 weeks since the package was delivered and i have still not recieved it. Everyday the estimated delivery date is changing, this is highly unprofessional.
Tracking id- [protected].
Kindly request you to help me find my package.