My first positive and first negative feedback

I had my very first positive feedback at ebay yesterday,

finally i have a number behind my name, instand of 0. I was soooooooo happy

However, i didn't even had time to celebrate it. i got my very first negative feedback right after that. And it was from my first customer. for whom i did make a special post here.  My special customer was angry because i send the painting in an envelop. My deal lord. This is how we send water color made in ricepaper in China. i didn't know that it will lead to a negative feedback. I have explained it in the item description nowadays. Rice paper can be fold before framing, it will not affect the quality of the painting at all.

I realise that not everyone know that ricepaper can be folded , so i did packing my painting in a tupe. but the post officer made me change it into an envelope, due to the safety reason during the Olympic games.  

Anyway. it's too late to say anything. My positive feedback score is only 50% now . what a nice start.    this is deep s**t,

    how i am going to get any trust afterwards? 

Is there anyway i can fix this ?

  My feedback score came back to 0 again. :(   and positive feedback is 50%  :(

Is it reasonable to have a chance to explain and try to solve the problem before getting a negative feedback ?

I am really disappointed in my first customer. we did have good communication and i really appreciate it. i had no idea it will end up this ugly .  

have you had this kind of experience before ?