You could leave now for good with paying 20k at the airport or you contact a lawyer asap. Wherever you stay there might help some visa-agent with "family" at your immi-offiz.
I recommend to give the transfer job to some car dealer. They have all forms in their shop and know what's requiered in copies. Especially if you buy from a farang. For my motorbike they charged me 100 thb since i bought from private and not from them. Even if you need to pay 1000,- it's worth it.