How to add different time delays in hours in a scenario

Hello Makers

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I need help on 3 scenarios with some time delays. These 3 scenarios represent an sms sales automation where scenario send an sms immediately after book a meeting in Calendly - 1st scenario is working fine.

If after 24 hours (2nd Scenario) the reply is Yes(Inbound), then send a follow up SMS, then if the reply is No(Inbound), send a message that we can’t help you. I have a data store search module for prospect but it sometimes proceed to send the follow up message though sometimes it doesn’t but its operation are completed most times.

The third scenario will send a 3rd follow up message after 12 hours but it doesn’t work as expected. I have added minutes instead of hours for testing purposes.