Hindustan Petroleum Corporation [HPCL] — delivery boy demanding a filthy tip (extra money citing delivery charge)

Address:

560102

Date of Incident: 14th Aug
HP Gas Cylinder, M.M. Enterprises, Bangalore 560068
Order No. 100989
Cash Memo: 1007553
Issue Date: 12/08/17
Bill Amount (as per printed Receipt): Rs.524.50
Demanded Amount: Rs. 560
Paid Amount: Rs.550

Delivery boy demanding a filthy tip of Rs.35.50 citing Delivery Charge. Why should the consumer pay a delivery charge when it is not mentioned in the Cash Memo? If this Agency is delivering just 100 cylinders a day (just for illustrating) they are earning more than a Lakh and this is Pure black money. If Mr.Modi n team are so specific why not start here??