DTDC Courier & Cargo — Misdelivered the package and not responding

I sent a package o[censored]rgent medications to a consignee in chennai via dtdc, the deliver status was updated to be delivered in their system, but it was delivered to so mislead person and this is so irresponsible they aren't responding to my complaints and reacting to their worse service. The package had medication which was an urgent requirement, the consignee is suffering without the medications and if something endangers the consignee life, dtdc is solely responsible for this.