What should I do after my freelancer visa application was rejected by the Thai Embassy in Singapore?

Just got a rejection notice from the Thai Embassy in Singapore.

I applied via the freelancer route - supplied all the documents necessary within the application form. My portfolio, my bank account showing 500,000 THB for 3 months.

I'm also a Singapore citizen applying.

I find it so weird that they didn't ask for more documents nor for an interview, but it just went from "Document Checking" > "Waiting for Approval" > "Rejected"

I'm trying to call them now to find out the reason. Should I head down to the embassy in person to ask for the reason for this 'ineligibility'?

Edit: Is there anything I can do about this now? Or just take the L and try applying from another country?

That $500 application fee hurts and I'm not sure if I would be willing to spend to try again even with Soft Power. It's ridiculous.

Final Edit:

I was just told by the embassy that I was deemed ineligible by the MFA HQ because I am a freelancer without a contracted income with a company. Kinda defeats the definition of ‘freelancer’ in my opinion, but it is what it is.

The staff also told me that things are becoming stricter and they’re approving less DTVs compared to the past.

For anyone else who is applying as a freelancer, just make sure you have yearly or permanent contracts with companies to show consistent income.

Well.. I guess I might either apply again through the soft power route or else just do visa runs every 2 months. Cheers to everyone that helped!