Macbook air touchpad clicking but not moving

Hello, im writing in here because i have a problem with my Macbook air from mid 2011. I bought the mac a few months ago with a defect touchpad that wouldn't move the cursor or right click (it's able to click normally though), thinking that it would be easy to fix, just by replacing the touchpad. Now a few months later i've tried:

• Changing the touchpad (same result. I used the exact same touchpad model)
• Changing the touchpad cable
• Resetting all kinds of stuff
• Calling apple support and following their instruction
• And messing with the touchpad settings

But nothing seems to work, currently im using a wireless logitech mouse to control the cursor which works perfectly fine. I would really appreciate if somebody could help me find a solution, because im currently clueless about what could be cause the problem.