Indraprastha Gas Limited [IGL] — arbitrary visiting/inspection charges

I am charged three visiting charges in the bill invoice number.:[protected] invoice date: 03.01.2018. The total visiting/inspection charges along with taxes is rs.606. I do not know who visited where and inspected what. Nobody visited my house. But if there was some visit made to check the meter or any connection repair why should i be charged for that. Can invoices be raised in such arbitrary and willful manner. I intend to approach the correct forum to seek judicial remedy as i am sure this could be a scam by gas stations who may have been outsourced the job of meter checking and billing.