Hi, are you currently in the UK or abroad?
If it's the latter, could I ask which country you're in and how long you've been outside the uk?
Can you receive calls and texts?
Have you tried switching your phone off and on?
can you see your mobile number and balance /goodybag hereHttp://giffgaff.com/dashboard
Which phone do you have?
Is it showing a signal
(signal bars, giffgaff logo, connection symbol)
What does it say on the phone screen when you dial
Can you call 43430 and 443 ?