Which is the best way to update an excel file using mapper file

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C#

MS-Excel

Hi Friends,

I need to update an existing excel file, while googling i found mainly three method, OLEDB,Interop and openXML. So i am confused which one will be better and effective.
My Requirement is, I need to open an excel file an make necessary changes and save as in different location. For updating excel i have a mapper file. i need to read the mapper file and update the cells. My excel file contain around 15 sheets and each contains around 30 rows and 10 columns.
My Mapper file structure is

Item, SheetName, CellName
Amount, sheet1, B2
Tax, sheet2, D10

Please guide me to achieve this.

What I have tried:

public static void excelsave()
       {
           Excel.Application oExcel = new Excel.Application();
           try
           {
               string excelorignalpath = @"C:\Users\Hp\Desktop\exceltest.xlsx";
               string excelbackuppath = @"C:\Users\Hp\Desktop\Backup\exceltest.xlsx";

               Excel.Workbook book = oExcel.Workbooks.Open(excelorignalpath);
               Excel.Worksheet sheet = (Excel.Worksheet)book.Sheets[1];
               Excel.Range excelRange = sheet.UsedRange;
               object[,] valueArray = (object[,])excelRange.get_Value(Excel.XlRangeValueDataType.xlRangeValueDefault);
               valueArray[2, 2] = 12345678;
               excelRange.Value = valueArray;
               book.SaveAs(excelbackuppath);
               book.Close();
               Marshal.ReleaseComObject(sheet);
               Marshal.ReleaseComObject(book);
           }
           catch (Exception ex)
           {

           }
           finally
           {
               Marshal.ReleaseComObject(oExcel);
               GC.Collect();
               GC.WaitForPendingFinalizers();
           }

       }