Originally Posted by
2MMKid
Call Res and explain to them that you were not made aware of the change and the change is a major schedule change of which they need your consent. Further explain that you are not able to make it and come armed on the phone with alternate times and routings to help ease the call.
That only works if you bought the ticket from AC directly (web or phone). If any other method was used (Expedia or TA) then AC isn't likely to help