I have a video that shows you one way of doing a loop in Bubble.
For what you need, you would need to do a loop similar to this but for timetable, then do another one for services. Just create something instead of modify it. I normally do two of the loop workflows and connect them so the first one creates a timetable and then the second workflow creates each service, the starts back over to create the next timetable. Does that make sense? 
Check out a simple loop workflow here: NoCodeMinute - eLearning Hub
If you need to, I can always walk you through it with a coaching session. Hope that helps!
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