I want to complain about visa agency, they hold my passport for one month for visa extension but i chocked nothing was done! Now i am not sure if i am overstaying or now !

I am i a critical situation and seeking your advice , and where to complain officially about these agencies??

I have a new extension of stay based on retirement,so I'm in the first 90 days period after a new extension. Because of an error at the bank yesterday I went under the amount of 800000 Baht. They immediately corrected their mistake, I explained to them that I can't go below that amount. I asked for a statement on paper to give this to immigration but after a phone call to their head office they said that it would not be a problem. Anyone with experience with this?Thanks.