Mahanagar Gas — Bill Paid via Amazon Pay successfully but not reflecting by MGL

Address:

Mahanagar Gas LTD , Thane, Maharashtra

I have paid MGL bill via Amazon Pay on 01s May 2023 ..but on 20th May i get message from MGL bill is due and pending..Even after doing hundreds of followups calls, mail, chats with Amazon and MGL and giving all proofs that payment was successful from Amazon Pay, MGL is still working on the issue.
Lot of my time is wasted to share all proofs with MGL..
Now they have requested me my Financial Statement of 20 days..These MGL guys are not aware of any kind of security for requesting any Financial statement from customer...This was expected as this is a government il-literate organisation

Very pathetic system of Mahanager Gas, Thane...