You can find all the contact information in the https://www.bolsamercantil.com.co/sociedades-comisionistas-de-bolsa section so that they can give you the advice you need to start doing business.
Yes, the Monitoring Division has among its tasks that of receiving and servicing the claims submitted by the clients of the Brokerage Firms for non-compliance with their legal obligations, in accordance with the complaints and reports procedure. You can submit them in the monitoring site at https://www.bolsamercantil.com.co/en/funcion-de-supervision
The Disciplinary Chamber has the power to impose penalties such as: Public warning in writing, fines, limitation to participate in one or more markets and/or systems managed by the Exchange or the temporary prohibition of performing certain types of operations, suspension, exclusion or definitive prohibition to carry out their activity on the Exchange. Learn more about the Disciplinary Chamber in section https://www.bolsamercantil.com.co/funcion-disciplinaria