Sabarmati Gas — I am complaining about gas bill

Dear sir,

Yesterday I was out for 1 hr from home and on that time only your person come to take gas reading for gas bill of may 2022.As my home was closed he put status as meter not read and make a bill of 5 unit.Now I am going to pay that 5 unit bill but my question is that will I get this 5 unit minus in my next bill.Because previously also you have charged that minimum 5 unit and in next bill too inhad paid that extra 5 unit charge.So please clarify me that you m which basis you are charging that extra 5 unit rupee from a middle class man.