Mahanagar Gas — Sept'21 bill added to Nov'21 bill with penalty !!

Address:

Mumbai, India

I have sent to MGL as proof : screenshot of the paytm successful payment done for paying Sept'21 bill.
I have also sent MGL, photos of relevant pages that shows payment to MGL and amount debited in my bank account .
Yet, they that they returned the amount !!
Why did they return ??
There is NO entry of above return amount in my passbook !!
It's all along a delay and refusal tactic to harass the consumer.
They have so far not produced any proof of their returning the amount !!
Writing to MGL support, info, vigilance has not yielded any results I have been corresponding with them for nearly 9 DAYS continuously !!
Kindly help and oblige

NCPathak,
BP [protected]