What should I do about my 15-day visa in Thailand if I have a planned departure date of November 8th?

Hello,

I am Bulgarian and I arrived on Oct. 10 in Bangkok.

At the airport, I realized that I need a visa that is 15 days maximum. So I paid 2000 baths for the 15-day one-arrival visa that ends on October 24th. I made my passport a few months ago in Bulgaria, the woman told me that I did not need visa for less than a month. The problem is that the law has changed and that I already have my return ticket scheduled on November 8th. How can I do? Can I go out for example on the 24th of thailand and return on the 26th by making a new visa of 15 days as I did at the airport of bangkok arriving?

But on the internet I saw that once the territory left I could come back only 30 days after the release date. How can I do? Do you have a solution? Thank you