Return to previous Call Activity

Hello , I have next scenario: One BPMN that is made of only Call Activities. I would like to be able to return to previous call activity after I get “reset” call from the UI (I get reset from “confirm coupon” task) . What is the best way to do so?

You could throw and error event or an escalation event from the sub process that can be caught by a boundary event on the Call Activity on the parent process.