After you file

Credit karma has poor customer service, someone took my refund out of my account, I reported tried to dispute it and theyre not trying to give me my money back.  Not only arent they giving my money back I can't log into my own account. All they say is that they're going to escalate this to a higher manager. "(A manager or representative that can't speak on a phone? Only through email?)"  And is credit karma owned by [removed]? I feel like every trime I call it's the same guy. What can I do