It just says £10 £10 £10 £10
Take a look at this page https://giffgaff.com/dashboard it will show what you have purchased in terms of goodybags and/or credit. Also have a look here for an itemised list of the purchases https://giffgaff.com/profile/payment-details selecting the 'My order history' option.
You are suggesting that 4 x purchases of £10 each have been made. Once you know what you actually have, you can decide what to do next.