tashalouise2018 Hey there,
You likely have Auto Topup enabled on your account!
How to Turn off Auto Top-up
Go here: https://giffgaff.com/profile/payment-details#autosettings to turn off Auto Top-up.
As we in the forums are just Members like yourself, we cannot action any direct Account Related refund issues, therefore, please make contact with a giffgaff Agent who should be able to help you with this issue. You can do so via this link : https://support2.giffgaff.com/app/ask/Top-up-balances-and-goodybags/Credit-debit-card-or-PayPal-overcharging/form/
Please also ensure that you give the giffgaff Agent as much information as possible in your message to them so that they can assist with resolving things for you more quickly.
Allow from a few hours up to a maximum time of 24hrs for Agents to respond to your request which will show here https://giffgaff.com/support/questions when logged into your Account Dashboard : https://giffgaff.com/dashboard. giffgaff Agents work from 8am until 11pm Daily.