By your own admission you have not made any monthly transfers, so if you want to continue obtaining extensions to remain in Thailand, regardless of whats said, you have to transfer that 800K. As you've been requested to provide evidence of making those monthly transfers, and you haven't, then obtaining a further Embassy income letter will not help. For reason of retirement, there are 4 methods by which you can show compliance with meeting the financial requirements. Embassy Income letter, OR Evidence of 12 x 65K monthly overseas transfers, OR 800K deposited in a Thai bank account for 2 months prior to the date of application, OR Combination of funds and monthly transfers totalling 800K for the year. 1,2 and 4 are now not possible, given your Immigration office will no longer accept an Embassy Income letter without evidence of actually making those monthly transfer.