Any person who violates or fails to comply with, or aids or abets any person in the violation of, or failure to comply with any of the provisions of this chapter is guilty of a class C felony pursuant to chapter
9A.20 RCW. Any such violation constitutes an unfair practice under chapter
19.86 RCW and this chapter and conviction thereunder is grounds for license revocation under this chapter and RCW
18.235.110. Retail installment contracts under this chapter shall be governed by chapter
63.14 RCW.