Hi wendyayre2016 >>>
Check fully through the below.
PLEASE NOTE: Never ever post your voucher on the Community as it is a Public Forum open to all
Redeeming a giffgaff or a o2 Voucher
Input the 16 digit code as printed on the receipt.
( Example) 0000-0000-0000-1234
Just To Add: If its a O2 voucher they can be a pain to work straight away, they need several attempts in most cases (it may say voucher invalid) but it’s not invalid as it’s just a glitch/problem in the giffgaff system or sometimes it says invalid but its already been added, please do check your balance and payment history
Check your payment history:
If it’s not been applied, carry on with the below >>>
Dial 43430 (freephone number) Only if your fully activated
Or this can be done online ➜ https://giffgaff.com/buy/redeem
If your trying to apply the voucher via a Internet explorer website on the giffgaff homepage and your having problems, read/try the below.
Try it using another internet browser such as Internet Explorer - Firefox , Microsoft Edge or any other your not using/used, Chrome seems to be a problem, and also clean your internet cache and cookies then try it, theres a link below to help you out if needed with what advice to try >>>
As explained above, >>>
Thing To Try/Clear/Clean:
• Try another browser - Use the Full Site and not the giffgaff App. Try using Internet Explorer
• Try another device - PC or Laptop (ideal)
• Clear Cache.
• Clear browsing history.
Try ➜ http://community.giffgaff.com/t5/learn-giffgaff-top-tips/logging-in-other-browser-issues/m-p/3964167
Stay Safe & Kindest Regards.