Nah... I highly doubt that it was that easy... Phuket isn't a good place for opening accounts anymore, not without the requested kind of visa. He might have been lucky using an agent... but actually the most agents don't offer this "special" service anymore... 🤔🙄
"15 days before until due date" is the old timeframe, it's 15 - 8 days before (!) due now... since about Covid if I'm not totally wrong. So... you were too late with 7 days before, hence rejected.