I booked an Air Canada Vacations Package to Jamaica for Sept **-Oct *, ****. The flight...

I booked an Air Canada Vacations Package to Jamaica for Sept **-Oct *, ****. The flight leaves at *:**am from Toronto to Montego bay - Booking No.********. I live in Newfoundland and I booked a flight to Toronto using CIBC Adventura points on the **th in the afternoon. This was an error on my part and I tried to change it * days later once I viewed my email. I did not realize the error I made until then. I meant to book the flight on the **th. I have a Hotel Reservation for Marriott Element Hotel already booked for the **th as well, so it was just a slip-up. When I called Air Canada and CIBC Rewards I was told that I cannot make any changes to my tickets at all, no options! I was not aware of this and I have booked past flights via same and have changed dates*times with a fee*additional points and have even cancelled a flight and used the points within the *-year period. As of now, I cannot make my connection to my Air Canada Vacations and I will have to cancel both if I cannot change my flight which is in * months. I do not see why any policy would prevent me from doing this - it only makes perfect sense to be able to do this. Human error is fact and one small error should not interfere with me and my partner from having a great vacation. In future, if this cannot be resolved to my satisfaction, I will no longer book any flights*vacations through Air Canada. I intend to travel at least twice per year with my partner and sometimes with * children. Please address this issue for us. Thank-you and have a great day.