Why not search the group, specifically for that embassy, that question has been answered countless times allready.
When you don’t want to be a contributing member of the group community, but only anonymous, why should anybody waste time to help such leeches of the group.
If the bulk of your supporting documents are in another language than Thai or English, you could benefit from using a Embassy in the country the documents originated from, and avoid being asked for additional documentation, which would put the application processing time back to zero.
You have to consider the reason for the 500.000 baht deposit, that you should be able to pay a fine, hospitalbilln and other such sudden big expenses immediately and without having to ask your father to wire you money.
When you realize that, it is easier to comprehend why it has to be your own money and not from a guarantee.