HelloIm writing on behalf of my elderly mother who lives in Melbourne. A few months ago she noticed a terrible gas smell in her front yard. It turned out that the NBN broke the gas pipe when they were installing - unfortunately a not too rare occurrence, I hear. She has now received a gas bill for thousands of dollars, which has upset her greatly and is patently ridiculous and unfair. I live in Sydney and am trying to calm the situation but have no idea who to call. We would like AGL to bill NB ...