From what I gather from your question is that you have been charged with at least one count of perjury which is the intentional making of a false statement under oath. In most countries the charge is a felony.If you have been charged with the crime of perjury and cannot afford an attorney, I suggest that you contact the public defender's office in the locality where the criminal matter is pending against you to see if you qualify for a public defender or a court appointed attorney to represent you in the matter you are writing about.You might also contact your country's consulate in Portugal to assist you as well.