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I need some help and advice. Back in November/December I got an order for a very big commission painting. Since it was an expensive piece, I decided to be fair since I don't know this person personally, and asked for payment for half the cost of the commission and canvas cost before I started, and would accept the second half payment along with shipping costs after I finished. I got the first payment, worked on the piece for like 3 months straight, emailing progress photos throughout. I finished the piece in March and the buyer is supposed to pay me the rest so I can mail it out. The last email I have from this person was in April when I was told they mailed me a check, but I haven't received anything. I've been emailing this buyer on Facebook and on 2 email addresses and haven't heard back. I also text this person because they gave me their phone number to text a progress photo for a separate commission I did a year ago. I'm assuming they have the same phone number (and had to go through old emails to find it). Didn't hear back. The only thing left that I can think to do to contact this person is to physically mail them a letter because I have their home address. What else can I do?? Honestly, I'm really fed up. This is ridiculous! I'm done being nice. I worked my ass off for months on this piece and I want the rest of my payment. What do I do? Please help!