Between booking the flight and easyjet cancelling it, I changed bank and closed the account that I had used to pay for the flight
Oh dear, unfortunately this is an issue that requires a lot of patience (really a lot) and this is why I always use a card that I am (pretty) sure I will not change in the next six months.
The funny thing is that even if I used two different cards they continue to pay back the refund on the one used first.
Good luck.
¡Suerte!
Ulxima