how do you handle a contractor license issue.

I do design consultation work for landscape and soil remediation rcomendations. I do not have a contractors license. I did work for a client who called the contractors state license board and reported me for not having a license when he knew I do not have a license. He paid a fee to me had soil delivered work of two laborers and my fee for design then took my plans and demanded his money back and said he will do the work himself. I billed him for the totaal used for the work and offered him a balance back and he refused. he does not want to pay for my design or my fees for any of the work.