VSC went out for the third time in 6 months. What else can I do?

What is your question?

My VSC sensor initially went out because of me. Let me explain. I was trying to install an amp for stereo, while trying to breach the firewall, I drilled through something connected to the VSC. I took it to the Dealership I bought it from, they said it was the brake boost system. They ended up having to replace the entire system. Upon saying it was "fixed." I drove it off the lot and not 5 minutes after driving all acceleration went out again. I took it back. After a week of waiting they said it was the acceleration system or VSC. And that there were sensors that could be out of whack. They replaced one of the two vsc sensors charged me for it. Then without even giving it back to me told me that the sensor replacement didn't fix everything and that an entire pedal replacement should do the trick, so I said go ahead, after all of this the VSC worked for about a month 3 weeks exactly and the first time I took it out over 60mph it went out. I'm beyond frustrated. This is just bad business to me. Am I being manipulated here? Are VSC's on toyota's this complicataed? Any help would be appreciated