Carbon monoxide

Today I returned home to fine my carbon monoxide alarm going off. The main gas people came out and said my alarm was faulty. Then he made my sign to say he'd turned my gas off then he said it was still on and told me to ring my normal gas man. I'm confused as to why I need my normal gas man if my house is safe? Also why say it's off if it's on? I'm worried to take my lg home. Any ideas or help greatfuly received x
Asked Jul 12, 2014

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