Hyundai Motor India — problem while applying reverse gear, problem in brake shoe

Address:

Allahabad, Uttar Pradesh, 211012

Sir i own hyundai i20 sports petrol version,
I am a defence person i hardly use my vehicle but whenever i use i for long drives around more than 100 km while applying brakes it cause a different kind of noise... I think some problem with my break shoe...
Last time i get serviced it at berkeley hyundai (Panchkula), i told them about problem.. They tried to rectify it but nothing worked out... I still have issues with my break
And second problem is all about reverse gear struct while applying and make noise..
Sir please resolve my problem as soon as possible and change faulty parts
Currently i reside in allahabad (Up).