Fix broken cord in umbrells

A brand and/or model might help. Try this https://www.youtube.com/watch?v=pqD8oevei8g

Fix broken cord in umbrells
Lost cause trying to fix the cord.

How long have you had this umbrella and do you have pictures? Where did you purchase it from? The first thing I would do is see if a new one would cost less than any repairs you could do.