How can I fix the Sims 3 for Wii so I can play it without breaking my Wii?

I've had sims 3 for wii for almost 2 years now. It has so many problems, I'm not even going to start naming them. But the game always freezes and especially when I get further into the game and try to save. So then even though it says "saving in process to not turn off or reset", I either hold the power button until it turns red or if that doesn't work, I pull the plug. Then finally one day, the game broke our wii. The lazer in the disc part or something like that broke and the disc channel on the wii stopped working. We had to buy a new wii (which i think wiis were upgraded so I figured it would be okay) but recently it's been freezing again and my mom told me to stop playing that game because it's going to wreck the new wii. This really upsets me because I spent 40 of my own bucks on this and I really would like to play it without problems. Is there any possible way I could get my money back with no recipt and 2 years later? Or better, is there any way I could fix it?
Thanks, anything will be helpful.
Oh and does anybody know if there will be a fourth game?