You haven't given it long enough. It takes a good 2 to 3 weeks to adjust to a new electric razor. The irritation should pass.
There are things you can do to minimize irriation. Washing and drying your face thoroughly before you shave removes the oil from your skin that inteferes with the foil. If this leaves your skin too dry, then you can try a pre-electric shave gel (which you have to let sink into the skin before you try shaving).
You need to shave against the growth, run your finger through the stubble to find the growth direction and push the razor in the direction of the most resistance.