My friend has similar problem and found it was a fake accusation. He reported to ombudsman, human rights commission (said they can interfere court) and anti corruption to ask for 130kB back. u may visit them
https://www.lawyerscouncil.or.th
https://www.nhrc.or.th
http://www.ombudsman.go.th
https://www.nacc.go.th
court can give u pro bono lawyer (free) but they act with judges, u need to keep evidences and judges may not make u fine so much