Indian Oil Corporation [IOC] — lpg cylinder not delivered physically while message of delivery received

My mother father are senior citizen and stay in saharsa bihar. While i was on visit i had booked a cylinder online for them through my mobile on[protected]. On[protected] i received a call from vendor whether i have booked a cylinder and i confirmed the same with address and location of delivery. Within 5 minutes i received a message on my mobile that the cylinder has been delivered; on enquiring with my father, i got to know that same has not been delivered. On contacting the vendor he said that same will be delivered on[protected]. From 9th onward he has switched off his phone and distributor landline is not being picked. Tollfree compalin system not working.
I am not able to understand where to go and what to do?

My mobile no. Is [protected]
Consumer id : cx14905057
Indane distributor: shahid raman gas agency, saharsa, bihar
Invoice no.:[protected]
Vendor no. [protected]