hi mariam where are you here in Phil? I am in Manila. We paid my visa online april 20, i was using my husband master card , I tried 3x finnaly it worked, u can also write an email to the helpline
UKBAIG.ServiceIntegration@fco.gov.uk I asked them if my payment has gone through as I tried twice they will ask you when did u pay and what time. It wont take long to send u back if payment, I received email just 24 hours or less, sent two emails. The third time we paid, my husband called his bank and while I was doing the transaction the person from the bank was on the phone because the reason why the payment didn't gone through because the bank hold or block the transaction. but I understand u are using debit card, the helpline could help you as well.