1st Darkmatter

Greetings to all I would like your help. The day before yesterday I paid 1500 lindens to receive this prodact "JVTEK LandMap Vendor 4.0" I get the landmark from the Creator profile -> picks to SL STORE at http://maps.secondlife.com/secondlife/Ranunculus/201/244/28 The creator has put a sign that allows you to buy the product from that Vendor at his SL STORE ... but the product never comes. I olso try the "redelivery Vendor" does not correspond too, When i click it i get the message "redelivery: You do not have any products eligable for re-delivery." This product never arrived in my inventory. I sent 3 notecards with the issue and all the details from my transaction history to the creator but all ignored by him. no replay, nothing.... sound of silence. what i can do? https://ibb.co/KhPpXxq