求英语翻译：你好,我遇到点问以题,为什么我无法兑换呢?请帮我查询一下,谢谢!

excuse me,i‘ve got a problem,i can't make exchange（如果是积分的话,exchange/redeem my points）.would you check it for me please?thank you.
这里面的“你好” 作为问问题之前的招呼：“打扰一下”、“不好意思”,应该是“excuse me" 而不是hello、hi之类的 ,hello、hi 用于和熟人朋友打招呼.
excuse me是向别人询问,请教,或是请求帮助时使用的客气语.有麻烦对方之意
这里用hello、hi 有点让人贻笑大方了吧

翻译：Hello, I have encountered some problems. I wonder why I was unable to exchange/redeem. Please help me check with that. Thanks!

Hi，I meet a problem，why can‘t I change it？Find it out please，thanks！

Hello, l have got some problems here, why can't l exchange my points or coins? would you like help me to check it out? much thanks!

Hello, I met some questions, why can't I change?