@Caroline3g Hi there and welcome to 3Community 👋 I've moved your post over to the Prepay section so other members can find it easily. Tell me, have you been able to top-up using your voucher since you posted? Let me know and we'll go from there 👍
@Caroline3g Are all other pages working ok for you on My3? I'm guessing you've tried clearing your cookies, using different browsers etc? You can call 1744 or text TOPUP and your voucher code to 50272 in the meantime to apply your credit