I really don't think you need to get an agent involved to purchase a Thai Elite Visa - it's a simple enough process to deal with the main office of TE in Bangkok ,all agents I have spoken to over the last 5 years have good English etc - I had mine done in about 3 weeks
so you would rather believe some Thai companies marketing that you have read online ( aimed at extracting a min 600k by the way ) instead of somebody who has experience of actually buying and using it - in this particular group - ok lad 🤣🤣😜
Since you are so knowledgeable about Thailand Elite visas you will be aware that PE ( privileged entry ) is the visa type that's printed into an actual Thailand Elite visa sticker affixed in a person's passport