DHL Express India — Delay in Delivery from UK to India

My shipment ([protected]) from UK to India is still not delivered since 8 days.
Still it is not cleared from Banglore. Daily they are asking so many additional requirements. It is only some documents and not any valued items.
Because o[censored]rgency we use DHL instead of ordinary post.
If I send it in ordinary post, it is supposed to be delivered before.