Thank You for posting your question to just answer today. This is attorney Bill offering legal information specific to your concerns.
You can check with the Secretary of State's office in California . They should have registered process server to whom you can serve a small claims petition.
Under consumer law and contract law you are entitled to a full refund.
You can issue them a letter of demand for a refund prior to filing. This usually resolves the issue and many clerks require you first to do so before filing a small claims suit which costs approximately $30.
As another avenue you can file a consumer complaint with the attorney general's office who will contact BA and seek a refund on your behalf.
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