Dreams about food often symbolize nourishment or fulfillment in various aspects of your life. In your dream, the bowl of rice and curry goat could represent something you desire or need, whether it be emotional, social, or spiritual sustenance. The setting of a crowded party may indicate that you're in a lively environment but perhaps feeling overwhelmed or disconnected from the people around you.

The interaction with the vendor about the payment suggests feelings of misunderstanding or conflict regarding your contributions in social settings. You believed you had already 'paid' in some way, possibly referring to your efforts or relationships, but the vendor's insistence highlights a concern that you may not be fully recognized or appreciated for what you offer.

Feeling bad about the situation could indicate an underlying worry about not meeting expectations or being judged for your actions. The surprise at the low cost of the meal might reflect your assumptions about the value of your contributions in life—what you think should be more expensive may actually be simpler than you perceive.

Overall, this dream could be prompting you to examine how you view your role in social contexts and whether you feel valued. It might be beneficial to address any feelings of inadequacy or miscommunication in your relationships. Consider reaching out to others to clarify your intentions and ensure you feel connected to those around you.