The Vivint Sky Control alarm panel is not Alarm.com compatible and cannot be used through Surety.
Additionally, that dealer is known to use proprietary sensors with the Sky Control panel, as such, wireless sensors may not be able to be re-used either.
More information on this topic can be found on our forum , including how to identify which wireless sensors are proprietary.
So long as you have the standard 345MHz sensors, and not the proprietary ones, a new panel could be obtained to use service. The 2GIG Edge or Qolsys IQ Panel 4 IQP4003 could work.