Sai Sewa Enterprises — gas cylinder subsidy not provided

Address:

Shop No.2, Sector B1, Vasant Kunj, CSC Market, New Delhi, Delhi 110070, New Delhi, Delhi, 110037

I took new gas connection in month of December, 2018 from above mentioned company and provided all necessary documents (including Aadhar Card) for the same and only female staff working there efficiently processed the entire process.
On being inquired for process of getting subsidy, she told me that it will be credited into my bank account as i have provided all the necessary details for the same.
But i never get subsidy and assumed it will get credited next month. After waiting for several months when i contacted the agency in month of May, 2019 and spoke to Mr. Pandey, he told me that my gas connection is not linked with Aadhar and i have to again provide them copy of Aadhar card to start getting subsidy which i already did while taking connection as address proof.
Then i personally went again to provide another copy of Aadhar card which the lady should have asked me if she required 2 copies at that time. Further he said that my bank account is also not linked and that is why i didn't got subsidy, which was another lame excuse as it is being linked form last 3 years.
Please take necessary action and how can i get my last 5 months subsidy?
And if not, then who is responsible for the same, because if i did't had contacted agency then i will never get subsidy even after a year or so.
The information provided to me was not complete and this could happen with someone else as well.