First, you keep giving all sorts of scattered information. Nothing is consistent and all we want is for you to call us so we can get a better idea of what is going on. You are unhappy, but don't want to give us a chance to resolve this further? That is not fair. You haven't tried to follow what we have asked for you to do. You do bear the responsibilty of following our guidelines for the warranty.
You are saying there is no Frequency? or No High frequency? What doesn't sound right? You say this but give no descriptions, and no detail. You say all of this and expect us to understand something that we have no idea about your problem. These units don't use Hi Frequency except for briefly when starting. Inverters don't use Hi Freq for arc stabilization.
What unit is this? The welder or the plasma cutter? A leak is simple to take care of...but we haven't heard anything directly from you. If you call you have to leave a message if you dont reach anyone. You say you don't have time to fix this, but the time you spent leaving negative posts could have been spent toward resolving the problem.