Hi Darren. Unfortunately there is no way to get this information quickly. You could request this info from an agent, but there will be a charge of £10 for this.
Sorry to be the bearer of disappointing news. Jondy
To get the Calls & text records for today, you need to contact giffgaff agents from here: https://giffgaff.com/support/ask and they will help you with it as this is something related to your account.
Also, for one day call details I don't thing giffgaff will charge you.