My pac code expires in 3 days

Angibobs Can you check to see if your old sim still works on the old network? If it has been moved to Smarty, then it won't work and you will know that Smarty have used the PAC to move your number.

It may be time to web chat with Support Team. They could issue a replacement sim if yours has been lost in the post and you will need to activate it according to instructions before it will work. On reporting it lost, your account would be suspended until the replacement is activated, so the lost one won't be of any use to somebody who finds it.