I provided materials and labor for a neighbor while helping him build a barn and run fencing. Gave my help in labor for free since we are neighbors. This transpired at the early rising of covid and my remodelling business was on hold. Finished the barn and we both discussed an add on to it. I offered my Lowes business act to order the materials from as long as he would repay. Neighbor agreed. After delivery he and I had a falling out and did not talk for a few months. When we would talk it was abrasive and harassing. I would inquire about material repayment and would get an excuse or a promise date and sometimes he would refuse to pay. This went back and forth for 10 months now. I have sent him invoices and copies of itemized lists of the materials to show the amount due which he is now saying that I did this on my own and he didn't order anything. There is only a verbal agreement and what messages I have to show the timeline. I am just now researching on how to recoup this amount for my business and found that I may have missed the deadline for mechanics lien. Is there another option outside of losing 1200$ for materials he has used and not paid for? Thank you for any advice.