Maharashtra Natural Gas [Mngl] — Not received bill in 8 months

I have two meters of MNGL one is working condition and one is not in working condition. While assembling technician person didi not handover any documents, because of the same we are unable to recognise exact BP number of meter. [protected] & [protected] are the BP numbers assigned under the name of Anant Ramchandra Watve. Service providers and Call center people are not giving proper instructions to what to do to get the bill for working meter.
I am attaching a photo of working meter, hopefully you will reply or take action on the same. I am Mr Sagar Watve grandson of Mr Anant R Watve. Number is [protected].