@gme-eg
Your screen shot indicates that you are trying to find an item in a SharePoint list by matching the list item ID to the event ID. This will not work - they are not related.
I suggest adding a column to the SharePoint list called EventID. When an event is created, created an item in the SharePoint list and store the ID of the event in the Event ID column. Then, try to match EventID in your OData filter.
Let me know if you need more help.