What often happens in these situations is something called an Authorisation (this is like a reserve) is placed for the ammount requested, then after about 2-5 working days they take the money, so the money will still show until they take it. But she wont be able to spend it because its reserved. Get her to check her balance against her avilable balance,

If her balance is say £320, but her avilable balance is £20 then its alright, there is no need to worry.

Contray to belief the money isnt taken out straight away, its reserved for a few days then taken a few working days later.

 

The ultimate resource for financial debt