If they don't recognize your email, and they typically won't, they will DEMAND a PayPal receipt number (which means you have to terminate the call to look one up and wait another 20 minutes to find a COMPENTENTENT person, sometimes called a "Supervisor"). OR, they will ask for your credit card # so they can bill you again. Then, when calling back, they have no idea what you're talking about and you have to re-produce the same scenario you spent the past half hour talking to them about.
Seems they intentionally make it difficult to contact them. By the way, the last time I asked to speak to a supervisor, that person became abusive and belligerent. These people MUST be part of some sort of crime syndicate, or, if they're acting on their own, they are doing so without ANY regard for their customers. I'd be willing to join a class-action suit against these monsters.