I had a similar problem, check out the Mazda2 Owners group on Facebook... lots of stuff is posted there that doesn't make it here. Here's a copy/paste of what I did on my 2:
Its a pedal extension to aid in heel-toe downshifting. My stupid clown feet are too big to use the ball of my foot on brake and heel on throttle "correctly," so I had to do this to get the pedals closer to each other so I can just tilt my foot to the right to blip the throttle. I had to shim my brake pedal upwards by adjusting the pedal pushrod I think 2 full turns.
Here is the "U-bracket" that got adjusted:
And in the car:
It's excellent and took about 2hrs for me to make, plus another 30min to adjust the brake pedal. Note buy a new brake switch and have it ready to go when adjusting the brake pedal as it's not technically reusable and may malfunction or fail to work.
In your case it sounds like you just need to adjust the brake pedal downwards which is easy. Again buy a brake switch before doing anything.