Delhivery — Pickup pending since 21 days

Its been half a month since my pickup is at pending. There's no response from their side or the sellers side.. Please take necessary actions as its their duty to pick the product or cancel it withing the given period of time if the package isn't delivered. They have the authority to take action against the seller who's holding up the product for a month after generating the pickup awb no. But it seems to have low level of management. Completely disappointed over the service. After calling the seller multiple times they say it will be picked up. Within 2 days and i am hearing the same response since 10 days after continuously calling them. Delhivery guys are not replying to any email. And i have raised complaint multiple times.. My complaint id is 11015
I have mailed them multiple times but it seems they are having a very low level of customer management.