& welcome to the giffgaff Community
Sorry giffgaff don't have a dedicated telephone number you can ring to speak to a person. All giffgaff support is done online. If you require support with an account or payment issue you can raise a support ticket with a giffgaff agent .
To contact an agent follow the link below https://giffgaff.com/support/questions
Or If you have a technical issue, you can post it on the community here and giffgaff members will try to assist you further.