Proofread 1000 Customer Spreadsheets

I have a collection of roughly 1,000 spreadsheets holding customer information that now need a meticulous data-accuracy audit. The files are a mix of Excel and Google Sheets; each one contains contact details—emails, phone numbers, postal addresses—alongside basic transaction history... (Budget: $15 - $25 USD, Jobs: Data Analysis, Data Cleansing, Data Entry, Data Management, Data Processing, Excel, Google Sheets, Virtual Assistant)