Excel Tool: Merge Customer Reports -- 2

I have three separate customer data reports that I download regularly. I need an offline solution—Excel-based is preferred, but I’m open to any lightweight desktop approach—that can pull the data from... (Budget: ₹600 - ₹1500 INR, Jobs: C# Programming, Data Analysis, Data Integration, Data Management, Excel, Excel Macros, Visual Basic, Visual Basic for Apps)