Asked to show bank book again

Back in February I submitted my paperwork to extend my stay by reason of marriage, something I have done for the last five years. I received my 30 day under consideration stamp on the 12th of February. About a week ago, I got a phone call from immigration to say that they wanted me to get another document proving marriage in addition to the one I had already provided. I believe its called Kor Ror Song, never been asked for it in the five years before, always just provided a document from the Amphur showing we are still married in addition to our marriage certificate. Went in and gave them the document and thought everything was fine. Yesterday, the 13th, I got another phone call from them asking me how much I now had in my bank account and saying they want to see my bank book again, updated on the day and with another letter from the bank.
I had already started using the money in the account after I got the 30 day approval so the balance was now below 400K. I went to the bank and deposited enough cash to bring the balance back up to 400K and also updated a second account that I had with around 70k in it and got letters from the bank for both accounts.
When I went to immigration with the updated passbooks there was a lot of shaking of heads and pointing to the fact that I had gone below 400K for a period of 10 days on my main account, the I/O refused to look at the other account, said they were only interested in the one I submitted with my application.
They then told me it would be up to the big boss to say whether I would get my extension renewed or not. My 30 day approval is up tomorrow, the 15th so Im wondering what are the options open to me if I get refused tomorrow, apart from go home. Im thinking that I can probably get a new non-o visa based on marriage and start the application all over again but Im wondering if as a stop-gap measure I can go out and back in again at a land border, coming back on a tourist visa?
The reason for asking this is that we (me, the life companion, kids and grandchildren) have got tickets to the superbikes this weekend and so if I do have to leave on Friday Im looking for a quick way back in, preferably through somewhere near to Buri Ram.