Indian Oil Corporation [IOC] — gas cylinder refill delivery delay

Website:

www.indianoil.co.in

I am a lpg customer having customer id cx4385155 and having the accout with gem gas agency based at kharar; dist mohali. Punjab. I have booked a refill vide booking number - 568296 on dated 25th aug 2017 but so far the refill is not delivered.
The agency owners do not pick up phone calls and are quite arrogant in customer dealings.
Therefore request to kindly help in this regard.