I did with them. Using this link. The price is 375 if you paid for 4 applications (you can use the others next time). I paid 500 cuz I chose just one. Once you submit take about one week and they e-mail and mail the 90 days receipt to your address. I didn't need to submit the TM30. Very good service. I recommend it. I do not regret. I would spend much more money in transportation since I live very far from the immigration, in Isaan area.
DTV_Begpacker I paid 500 Baht for the agency to do for me. I live in the country and I would spend much more money in transportation if I would go in person to the immigration. I do not regret. 🙂 Some Farangs spend 500 Bath in many others things. Why do not spend 500 with a good agency to do the work for you? Ps. I live in Isaan area, and most of the immigrations here are moving far from the downtown of the cities (Kalasin, Undon Thani, Khon Kaen....)
I think you should put "Embassy of France - Bangkok". I am Brazilian and my passport was issued in Yangon Myanmar. I put "Embassy of Brazil - Yangon - Myanmar".
Usually when this happens you go to immigration fill this form (link) and bring the required documents. But I never saw someone with DTV experienced this. Maybe better go to an immigration office to ask.
Qual embaixada você está aplicando? Meu passaporte foi emitido pela embaixada do Brasil em Yangon. Apliquei no Brasil ano passado. Em "Place of Issue" coloquei: