Mobile app Account dissappeared

[Ender]

Its 3am and i urgently need to send money for an emergency and my account on the app is gone. I tried unlinking the previous dashboard but when i try to link my card with the new dashboard it does not want to do so.
This is severley stressful, disappointing and inconvenient I dont know what to do because this is the first time this has happened I have deleted and re-downloaded the app countless times but nothing. I cant dial the helpline because i ran out of airtime so i cant buy more because the app is not working.