Maharashtra Natural Gas [Mngl] — Regarding not getting new connection after 5 months of registration

Address:

Pune 411033

Dear sir,
I have applied for MNGL domestic CNG connection in Oct 2021 and paid required fees also.
My application number : 031142
BP no is-.50293645 generated on 09 Dec 2021.
Since that day I am taking continuous follow up for connection, then MNGL informed me that after 3 months of BP no. generation, they will provide connection.
Now it is more than 4 months still I am waiting for connection.
I have given my address many times to these people.
WHAT SHALL I DO?