Re-index Site does not update Search index

Hi guys

Has anyone got issue with re-indexing SPO site or list? 

I re-indexed 4 subsites in one site collection three days ago, but the search result still shows the old indexed files. The search result even shows "Item does not exist. It may have been deleted by another user."  - this is not correct as I can access the file.

I initiated the sites re-index 3 days ago so I was excepting the search result would have updated by now. 

I appreciate the site index in SPO may take one day, but 3 days its a bit unusual.  

Is there any way i can trigger the search? 

Thanks