If the managing broker does not resolve it either, the Saskatchewan Real Estate Commission accepts complaints about licensee conduct and can investigate. Keep a written record of every message and missed deadline, since a documented timeline matters far more than a general impression when a complaint moves forward.
Your listing agreement itself may give you an exit. Most Saskatchewan listing agreements run 90 to 180 days and include terms for ending the relationship early with cause, so read that section before assuming you are stuck until the term expires.
Joel Dyck responds directly rather than through layers of assistants, which is the simplest way to avoid this problem in the first place. Get your hand-reviewed valuation from Joel Dyck.