Let me preface this by saying I'm not begging for flight secrets

I actually need brain cells that work - and I figured this would be the place to ask.

I booked flights with BA for April 1 and April 7 thru April 23rd. Paid around $900 each (dont hurt me)

I figured at the time, I was good on time and possibly I'd come back and Mum would be ok..(as per Dr)

Phone call 3 AM, I need flights THIS week, 23/24/25 for uh, 2 1/2 weeks? April 10?

Here is where my brain wont go, I can change with BA, they will waive the $275 change fee, but I need to come up with another $600 each,

OR -

They can do a full refund and I can book with a lower cost place (AC $1324 pp, or BookAirfare has tickets with BA/Iberia - for about $1250 each

BUT It takes 2 - 3 business days for the money to be refunded.

and the tickets will have gone up by then, and my whole family is waiting on my dates to set the date..

Help?