About Curry's Flexible Credit, is it possible to repay it with giftcards?

Anybody knows if is possible to get an item via "buy now pay later" and then repay this credit using giftcards? (I asked curry's chat an they had no idea).

I want to purchase something but i don't want to get stuck with vouchers if something goes wrong or goes OOS (my work offers them through a reward site cheaper).