Air India — no confirmation for change scheduled in flight

Address:

Adajan, Surat, Gujarat, 395009

My wife travelling alone to chicago.
Hence for comfortable fly booked from surat-delhi-chicago flight wide booking reference no y140l.
For return flight on 6.05.2019 scheduled has been changed & chances are that she may miss connecting flight from delhi to surat
Not able to contact air india customer care no nor getting any reply for my mail.
Now they are telling for they can give us next day flight but will not provide any accommodation for same.
We have to stay for their schedule change.
Pl do the needful