contact data is a total mess... mapping contact data

Just purchased a Galaxy 3 (love it) and my contact data is a total mess. Contact data migration from prior LG iphone did not work correctly, and now my contacts are scrambled eggs. Is there a way for me to zap all the scrambled contact data and migrate quality data into my Samsung. The Galaxy synch function is not working on any of my Google contacts , calendaring and tasks. How do I map data to the correct fields? Can I create a delimited text or spreadsheet with the data organized properly, and then import it into my Galaxy S3 with the proper mapping of data into my Galaxy?...Any adivce? CF