HP India — Hp 802 printer cartridges - offer and delivery

Address:	Bangalore, Karnataka, 560001
Website:	www.hpshopping.in

Received an e-mail offer of 23-jun-2017 of discounts on hp printer inks with an instruction to cite code hpscart10 for an addition 10% discount. When i applied this on my order form, got a response stating that the offer had expired on 21-jun. Why send such offers that are invalid in the first instance?
The order stated same day delivery (24-jun) got a call from hp online stating the that delivery would be in the evening. This did not happen; instead got an sms from blue dart stating delivery would be on 27-june!
Hp make promises it can't deliver on!