Hi, do you mean you E swapped from one giffgaff sim to another?
Could I ask the reason for that?
Have you switched your phone off and on?
can you see your mobile number and balance /goodybag here
Which phone do you have?
Is it showing signal bars and a connection symbol
(3G, 4G, H, E, gprs)
From your phone keypad dial
Star 100 star 7 hash
and press call
Do the same with *100#
What word or words do you see on the phone screen?