Safexpress — Delivery Issue of pune parcel

I'm expecting parcel from Pune on 24/10/24 or 25/10/24, which was delivered on 21/10/24. But nothing was received, so we checked and found it's getting delay because of Diwali. When we asked but other delivery companies are delivering material 1- or 2-days delay then why not Safe Express. They forwarded a statement stating that delivery delay because of Diwali, on checking i find out that letter was issue on 28/10/24. That mean they are delaying material purposely or lost my material. Because from Pune to Mumbai any company will deliver the material in 2 or 3 days or maximum 4 days. But they are saying it's delay because of Diwali and we issued notice for that. My concern is that before issuing their notice my parcel should be delivered on site.