Is the link I received for my refund/receiving my payment secure?

This solution is completely secure. Indeed, the email or link you received to receive a refund or payment allows you to connect directly from your banking space and communicate your bank details to your merchant's bank in order to receive your refund. Fintecture is a partner of your merchant and is a payment institution supervised and authorized by the Banque de France and the ACPR under number 17248.