Good Evening @klancylady. I am sorry to read that your data is being used quicker than you expected. This may be caused by Apps updating and/or running in the background, as well as your normal use. Your Usage Statement (please click to view) would confirm this, however the last 48 hours will not be displayed yet.
Please navigate to your Apps Store and the Settings within the App Store. Please ensure that the Auto-update Apps option is set to Wi-Fi Only and not Mobile data. Apps running in the background can sync and use data without you being aware of it, so if you don't want this to happen, please switch your mobile data off when you don't need it active.
IMPORTANT! - As you are using an Apple iPhone, please also disable (switch OFF) the Wi-Fi Assist feature when not required, as this uses a Wi-Fi/Mobile Data combination to increase data speeds. For further information on how to disable this feature, please click here to view official Apple instructions.
If none of the above apply to your situation, please click here to contact a Giffgaff Agent so they can investige the issue for you. It can take up to 24 hours for a giffgaff agent to reply.
Agent replies will appear within your account dashboard (click to view) and also in your My Questions area (click to view).