Blue Dart Express — delay in delivery of simple parcel

I had sent a parcel on 19th july 2019 from khandwa (Mp), to rewa (Mp), but you have not delivered it even after 8 days ; i am informed today that my parcel would be delivered by 29 th of july ie after about 10 days!!!.
May i ask you that why this much delay in delivering the parcel is taking place. Or i am a fool to spend 450 rs. For such turtle paced service??