Bharat Petroleum [BPCL] — Subsidy almost reduced to the bottom level

I am having a gas connection and the lpg provider is bharat gas. The distributor is super-chef gas service at new no.39, kannadasan st;t. Nagar,
Chennai-600017. My consumer number is 21538. Till march 2020, the subsidy was promptly credited to my sb account with my bank. From may, subsidy was stopped without any communication to me. No subsidy to the the refill supplied on 04.05.20. The retail selling price of the cylinder was 569.50. Despite my reminders to them, bpcl simply ignored my emails
No subsidy has been released till this date. For refills delivered on 02.07.20
(Retail selling price of the cylinder being rs.606.50) and on 25.08.20 (Retail price being rs.610.50), a meagre amount of rs.25.45, has been credited to my bank account as subsidy. This is atrocious. Their intention is to stop the release of the subsidy, completely. No clarifications from them so far in this regard. Is bpcl corrupted? Why they hesitate to come forward with their explanations for releasing a meagre amount of rs.25.45? Bharat gas should look into the matter and release the subsidy due for may, 20 and the balance amount of the full subsidy for july&aug, 20, failing which, i will be constrained to the concerned ministry and our beloved pm, who is against corruptions in all levels in govt. Organisations. Usually, the minimum of subsidy was rs.175/-