Bluedart — late delivery of letters

Blue dart delivered my letter awb [protected] containing cheque forrs 5 lakhs late by 4 days resulting in loss of interest and i lost a business opportunity due to non availability of fund. Post office delivers letters after 4 days for rs 5 postage what for spend so much money for such a useless work by bluedart.

If only one letter has to be delivered for which the deliverymen has to travel long distance, they simply report that "door locked" and deliver the same after 2 days. They also do not give toll free number to contact them