Google Sheet Customer Data Update

I have a Google Sheet that stores customer records, and it needs a fresh round of updates. A single CSV file contains everything—contact info, purchase history, plus feedback details—so the task is to bring those rows across and align each column correctly.

Here is what must be touched:

• Name and email
• Purchase dates and items
• Feedback ratings and comments

The sheet structure already exists; I simply need the new data appended or overwritten where matches are found, keeping the format clean and consistent. Accuracy is critical—no misplaced columns, no broken formulas.

Once the import is complete, a quick scan for obvious duplicates or blank rows will finish the job. The deliverable is an up-to-date Google Sheet ready for immediate use.