I bought Sing App React from this platform on the first try after the payment your site sent some error response in JSON format, which lead me to think my previous try was unsuccessful due to that reason I tried the payment a second time which also gave me the same response and at that time I received the mail for the first purchase but by that time it was too late, I am here to simply request a refund of the duplicate purchase as you can understand it is of no use for me. please provide assistance in the mater.