What type of "lien" process should my type of company pursue?

Dear Levelset Advisor: I have utilized your "notice of intent to lien" letter recently for a delinquent in payment client. I did not do any type of construction work at this client's home. What I do is appraise personal property to be sold, plus organize and conduct estate sales that are situated in clients' homes. This particular client chose to cancel her estate sale at the very last minute. My staff and I had already staged her home for the estate sale, displayed all of the household items that were being sold, researched resale market values and priced household merchandise, advertised the estate sale in several media venues, identified the fine jewelry to be sold and arranged for diamond rings to be appraised. The contractual agreement indicates that if the client cancels the sale, he/she are responsible to pay for services conducted and the amount is indicated in the contract. The client engaged my company on July 3, 2019 and then canceled the estate sale on July 30, 2019. I was notified by her son to send him the invoice, which I sent shortly thereafter. No payment was received. After a couple of weeks, I called and left a message, there was no response. Two weeks ago I sent another invoice with a friendly letter, again no response. I see that your services are geared to construction companies. Would my company fit in somehow or not? Thank you for your kind assistance. Sincerely,Cynthia Illicete-BurnsFull Circle Estate & Tag Sale Services LLC