商品購買之後，輸入金鑰，但此項工具的功能都無法正常使用，聯繫很多次，客

商品購買之後，輸入金鑰，但此項工具的功能都無法正常使用，聯繫很多次，客服都沒有回應我，我感覺受騙，所以我想退款。

結果 (英文) 1:

After the purchase of goods, input key, but the function of this tool will not work, contact a lot of times, customer service did not respond to me, I feel cheated, so I want a refund.

結果 (英文) 2:

After the purchase of goods, enter the key, but the function of this tool can not be used normally, contact many times, customer service did not respond to me, I feel cheated, so I want a refund.

結果 (英文) 3:

After the purchase of the product, input the key, but the function of this tool can not be used normally. I contacted many times, and the customer service didn't respond to me. I felt cheated, so I wanted to refund.