Astric Computers — abs sensor

I purchased volkswagen polo petrol 1.2 highline from evm volkswagen kochi manjummal, kerala
L, kochi, kerala 682034, on september 2016 and it run 11000 km. A few week back i had a vibration for brake pedal when i apply break and had a abs alert on 11.12.2017. My car was given to evm volkswagen manjummal, kochi, kerala. They told that the complaint was with abs sensor front right module fails. They replace it on warranty. After few week same issue 1-1-2018, again i given to service center they told me that abs software fails, they solve it on warranty on[protected], very next day[protected] again shows same problem. Abs light on after next starting it of but brake pedal vibrate
What to do???
I again i call them, they told me, come to service center we will replace the sensors,
Next day[protected] i going.
Any solution plz help me