Biometrics

I need help and I’m going crazy, we’ve paid for my husbands application (outside of the uk) I’ve been sent a link to follow to vfs.global to book my husband biometrics. My husband is doing his biometrics in Rabat, Morocco and I selected for priority and found a slot and I enter my bank details and what happens it doesn’t confirm the payment and then my screen goes blank. I have done this process around 5 times now and nothing seems to be working.

Someone help please