Gas leak prior to closing

[Avery Wayman]

So I recently purchased a home here in Lincoln, NE. This is my personal home. When in closing of the house a gas leak on the water heater had to be repaired for the house to meet FHA regulations so my realestate agent said they would get a verbal confirmation from the owner and selling agent that it would be fixed so that we did not need to reprint and sign new contracts. At the time I thought no big deal. Now we have had the house for about 2 months or so and have realized that the same gas leak is still there on the water heater. I can clearly tell where it is coming from and my dogs sniff at it constantly although I tell them not to. My realestate agent did send the copy of the invoice that was provided for the repair via email when I called her about it earlier this week. I am just trying to see if there is any legal liability anywhere here and who I should contact about trying to get it repaired. I figured I would probably need to contact the company that did the repair. Is there any legal route I should take before going any further on repairs? I dont want to have it repaired if there is legal action that can be taken prior. A gas leak can be a serious danger especially with two dogs running around it. Clearly there were either no actual repairs performed or the work was dangerously sloppy. I would rather someone like that not be out doing this in others homes.