When a list is updated, update an excel table in a dynamic excel file

Hi all,

I have a list where the first column is also the name of an excel file in a sharepoint folder (minus the .xlxs). When a row is added to the list or is updated, i would like the remaining columns to be added or updated to a table in the corresponding excel file. 

I thought something like this might be a good starting point but it just keeps running when i test it and doesn't complete. Can someone help me out with this?