We are happy, given an import file, template and dataset to adress any issues that are exposed by that combination. The statement "XLS import format does not work" is broad and can be disproved by demonstrating a single case in which it does work.

And, when discussing download files from a bank or other large institution, there is also the question about whether they have formatted the file correctly, and if not, who is responsible for dealing with the error.

For bank statements, we recommend using the OFX file format as it has generally been the easiest to implement and demonstrated the fewest anomalies in formatting.