Aircare mechanical solutions inc

We hired these guys last year to install a shutoff valve onto our gas line and hook up our gas bbq. Weve now been smelling gas very frequently and its clear the piece they installed is corroded, rusted and leaking. Ive tried to reach out a couple of times over the last couple of weeks to ask them to come and fix the issue (obviously leaking gas is very dangerous!) and theyve never responded. Really disappointed in the quality of work and lack of customer service. More than happy to adjust my review if this is addressed.