What cooking schools in Thailand can help with obtaining a DTV?

I'm looking for recommendations from people who have actually obtained a DTV through a genuine cooking school in Thailand.

I've been researching the Soft Power/cooking route for some time and am finding surprisingly few options in Chiang Mai. The schools I've found are either quite expensive, inconveniently located for me, or communication has been difficult.

I'm now willing to consider Chiang Mai, Chiang Rai, Krabi, Phuket, Bangkok, or another location in Thailand if the school is genuinely good and reasonably priced.

I'm looking for a school that:

• offers a genuine cooking course that you actually attend;

• provides the official enrollment/supporting documents for the DTV;

• has successfully been used by DTV applicants;

• is reasonably priced;

• ideally provides or can recommend reliable help with the visa application.

I would be applying through the Thai Embassy/e-Visa system in Madrid, Spain.

If you personally obtained your DTV through a cooking school, could you please tell me which school you used, approximately what you paid, and whether you were happy with the experience?

I'm particularly interested in firsthand experiences rather than advertisements from agencies.

Thank you!