Canon India — Scanner is not working

Address:

SCO-55, First Floor, B Block, City Square Complex, Near Bhardwaj Hospital, Sai Road, Baddi, H.P., 173205

I'm using canon imageclass mf244dw printer since previous 5 months in my office. but from previous some days scanner is not working and it is showing error "cannot communicate with the scanner, the cable may be disconnected or the scanner may be turned off". however all other functions like printing, copy are working properly.
i have also tried to call in customer care, however i got no response from the toll free numbers and they are not connecting my call to the executive.
kindly resolve my complaint as i'm facing difficulties in my office.