HP Pavillion cheap and low quality components

I bought a laptop in 2008 and in least than 6 months the laptop went 3 times to HP Service and they changed cables, memory and other stuff. Some months later and still least than a year after I bought it, the touch pad stopped working. They told me I have to pay $318.86 even with the laptop is under warranty because they said I broke
You can see that it's a low quality laptop (but not cheap, I paid $1200 for it) because it went to technical services 4 times in least than year.
When I complained about it and asked for a Supervisor who can explain me that case to me in Spanish they said: in 24 hours someone speaking Spanish is going to call you. One week later I was still waiting... When they finally call me they just repeated the same: you broke it. Therefore because they said that the warranty does not matter and I have to pay.

Someone tell me, how come I could break a touch pad? And I'm not supergirl with steel fingers. Can HP consider the quality of their products?