Jó ez így? (angol levél)

A feladat az volt, hogy elromlott az mp3 lejátszóm és le kellett írni, hogy mi a probléma és hogy hogyan lehetne kicserélni.

Dear Sir/ Madam

I am writing because one month ago I bought my mp3 player but not good. I don't know that what the problem. When I turn on writes on error, that low battery. Alredy I changed the battery, but even now not good. I think maybe the best idea would the exchange. How is it that? What should i do?I'm sending the bill ?I very like and miss because I listen to music every morning. I would like if the sooner exchange. I need my mp3 player. I am waiting for reply.