<human>: Can you give me a shortened version of the text?

So I open up my present from my parents knowing its this huge keyboard piano that i wanted and they knew the exact one I wanted too. after opening the box I find that the keys are cheap plastic and not the weighted ones I wanted. I told my mother that it was the wrong one and she agreed after pressing on the keys herself. My dad and I put the keyboard back in the box and I could see the look of disappointment in my mothers face. I knew she wanted me to get exactly what I asked for and she was heartbroken that she got the wrong one. Now here is the part that makes me feel like a terrible son. 
My mother offered to get me the better one but it isnt on sale anymore. it went from $400 to $800. Now I didnt expect to get an $800 keyboard but now my parents insist that they should buy me that one because It is the one I want and since I do need a keyboard for school. I told my mother that I would much rather not have one than have one I dont need and that I dont want them to spend that kind of money to get me the right one. Now I feel like I'm forcing them to buy me a better present or I make them feel bad for not getting me a present at all.
<bot>: parents bought me the wrong piano keyboard and It costs 800 dollars for the right one, now I feel like a jerk for rejecting the present