Run-time error '1004' - Method 'Range' of object'_Global' failed

I have a problem in VBA with a line throwing back an error.

What the macro is intended to do is find a particular cell then paste data into it.

The code is as following:

'To find Column of Customer imput
For Each cell In Range("B4:M4")

        If cell.Value = strLeftMonth Then
            DataImportColumn = cell.Column

        End If

Next


For Each cell In Worksheets("data customer monthly 2013").Range("A3:A9999")

'First Customer
If cell.Value = strFirstCustomer Then
        DataImportRow = cell.Row

    Range(DataImportColumn & DataImportRow).Offset(0, 2).Value = iFirstCustomerSales ****
End If

After running the above code; The code crashes giving the 1004 run-time error on the asterisk'd line. Also DataImportColumn has a value of 7 and DataImportRow has a value of 5.

Now my concern is that Columns aren't referenced as numbers but letters, so it must be that my code can never work because its a terrible reference.

Does anyone have any suggestions how I can make the above work?