FlyerTalk Evangelist and Ambassador: The British Airways Club
Join Date: Jun 2008
Location: Somewhere between 0 and 13,000 metres high
Programs: AF/KL Life Plat, BA GGL+GfL, ALL Diam, Hilton Diam, Marriott Gold, blablablah, etc
Posts: 33,194
There are many many threads on this question so I suggest a quick search. It will give you the best ways to check the fare you booked retrospectively. Only that will tell you what you would get back if you cancel or what it would cost to change in case that's an option.
The fare rules are what matters here. If it's non refundable then that's exactly what it will be unfortunately.