So I found the data in this submission again.
I retraced the update history of the data. It was uploaded on March 1 at the following URL: http://www.supersociedades.gov.co/asuntos-economicos-y-contables/estudios-y-supervision-por-riesgos/SIREM/Documents
The datafile is named "BalanceGeneral2015SIREMV2.xls" Theoretically this dataset is available online, was updated before our review ended and can be accepted.
BUT: I have all reason to believe that the data is currently impossible to find and access. I hope this information helps you to improve the findability.
The data is named in a way that makes the search for it impossible. Neither "BalanceGeneral" nor "SIREMV2" can realistically be interpreted as a "company register". Also the SIREM interface does not contain any tags, text or link names which would make clear that user can find company-related data here. Also the top-level page does not make it clear that users can find company register information (see image)
SIREM PAGE (TOP-LEVEL PAGE)
DOCUMENTS PAGE (EXACT PAGE WHERE THE DATA IS HOSTED):
Thus, the data cannot be found via Google. User need to know the exact file name which is (given the cryptical naming) not realistic.
Users also cannot click through from the top-level page (SIREM start page) to the documents page interface. I cannot find a link from the SIREM page to the documents page. See here:
You can see that the SIREM page directly links to files hosted on the documents page. But I cannot access the page itself, and neither can I access the relevant "BalanceGeneral2015SIREMV2.xls" file.
This however should be possible, as your URL "http://www.supersociedades.gov.co/asuntos-economicos-y-contables/estudios-y-supervision-por-riesgos/SIREM/Documents" suggests.
This gives me all reason to believe that the data are practically not findable and accessible.