Check the noise

You follow the noise and you find a big caravan. This is good! they can give you some answers and they are not bandits.
Unfortunately, when you are close, you notice something dark.
You notice chains, cages, and the grim expressions of the people being treated like livestock. You are in big trouble! they are slavers.

You turn to run, but it’s too late. Within moments, you’re surrounded, you want to cast a spell but you feel a sharp pain in your butt. Suddenly, you are too tired and dazed, your limbs grow heavy, and you fall asleep.

When you wake, your hands are bound with rope. The slavers discuss and say. "You’re now our property, don't test your patience, you are going to be sold in the next town"
You notice a collar on your neck, you can't cast any magic, and you are gagged.
You have only a few options.

Try to run and escape tonight. Nod with your head, accept their rules, and try to escape later when you have a better opportunity in the town.