So I've made an order got the code and pasted it into my bitcoin wallet and sent payment. Then when I go back to my order it says not paid then after a while it says expired. So I looked and the payment has gone from my bitcoin wallet. I contacted the seller and he said there's nothing they can do there end and to re-order. So I did and the same has happened? Now $80 has gone from my wallet? What am I doing wrong? And how do I get the bitcoin back?