H. P. Gas — pathetic behavior by hp gas distributor (sandeepthi gas service)

Address:	Hyderabad, Andhra Pradesh, 500073
Website:	myhpgas.in

Srinivas is the name of the sandeepthi gas service (Distributor) who takes care of the area i live. I had booked a gas on 23 oct' 2017 which is still not delivered. I had called srinivas (Sandeepthi gas) twice till last friday (3rd nov'2017) as all my family is working and i don't want the delivery guy to go to my place unattended. Gas was over the day i booked itself, so it was difficult to manage at home without gas for so long. 3rd nov, morning i called him up checking if he would deliver that day as he had told earlier that he would deliver on the 10th day after booking. He replied me saying, "i am not sitting here just for your delivery, i have other jobs to do." i replied, "there is nothing to get angry about, i have already paid for the gas cylinder online and don't want the delivery to go unattended for which i am following up as you guys don't even call if you're coming for delivery and would go back cancelling my booking like many times before." he replied, "i didn't get any online payment and i will deliver whenever i get time"
I rushed to the nearby hp gas office, and told them the same. They called srinivas immediately and confirmed him about the online payment. Srinivas asked the office people to ask me till what time i will be at home for him to deliver. That time the clock striked 11am, i told him i would be till 2pm as i will be going out for weekend with family and nobody would be at home till monday evening. I requested him to delivery only on tuesday by 1pm in the afternoon. He told he would do it.
Today (Tuesday, 7th nov'2017) i called him at 10am asking if he was delivering today. He told, "yes, i am sending a boy now for delivery". I was till 12 noon but nobody came to deliver. When i called him at 12:30pm, asking him to deliver fast as i had to leave for office, he replies "what is your problem on earth? Why are you eating my brain again and again. Delivery cannot happen according to your schedule." i answered him, "do you think i am a fool here following up with you everytime? I am in urgent need as i am cooking daily for 5 people in 1 induction itself. I don't want to miss on the delivery for which i am following up." he cut the call as i was saying and didn't pick when i called back again.

Is this how customers are treated? Am i getting a mercy by srinivas if he is delivering me the gas cylinder for which i have paid? Why are customers being treated as slaves?