Xiaomi Technology India Private Limited — mi a2 mobile

Address:

Q No F 64 Hill View Colney, JSPL, Patrapali Raigarh CG, Raigarh, Chhattisgarh

Mobile has been deliver to me on 16th aug'19 and it was cheeked without sim by wi fi on 17th aug'19. After this it was gifted to other person and she was starting it on 17th sep'19, but found that the mobile has some error. It is not supporting any thing. 22nd sep'19 informed local service center and customer care also. As per instruction service center it is repairable (Mother board to be changed) and made a job sheet.
Why i have to received repaired mobile at new one?
Very poor condition, no support given from mi company to me, i want to change for new one.