Thankfully a chargeback is possible here. While a chargeback is almost always "possible" it can be dangerous if the company you are charging-back is the only provider of a service. I'd be wary about doing a chargeback on the Google/Amazon's of the world but Hover? There are many other registrars out there if you are willing to transfer and for $3K I'd be transfering my domains and then filing a chargeback.
BUT, before you do that, threaten a chargeback. That might unstick their support or get your case bumped up the chain. If they still refuse then transfer and chargeback.
BUT, before you do that, threaten a chargeback. That might unstick their support or get your case bumped up the chain. If they still refuse then transfer and chargeback.