Start every escalation subject with the same words, so Redo can sort these tickets. Example: a Subject template of "Phone escalation: {{customerName}} ({{ticketId}}), {{agentName}}".
Then add a rule in Redo under Settings, Rules: the trigger Support ticket created, the condition Subject line contains "Phone escalation", and actions such as Add tag, Assign and Set priority (Redo rules guide). Redo rules can also check the sender address and the ticket channel. New Redo rules start as drafts, so publish the rule to turn it on.
