@allen94837 Hi welcome to giffgaff and the community
• SIM activation's are completed within 30 minutes, however during periods it can take up to 24 hours for the activation to complete.
• You can check if your SIM has been activated by logging in here
• You will notice the completion of the SIM when you see any active allowances e.g goodybag/ airtime credit along with your NEW ALLOCATED NUMBER
I hope this helps