Hi @CHRISPATRICK the only way to get your old number onto your new sim is to transfer to another network on PAYG then port back onto the new sim. You could try calling sky on 150 and ask if they can put your new plan on your old sim but they may refuse.
If someone has helped give them a thumbs up.
If their answer solved your issue mark it as the correct answer.
I won’t respond to direct messages so please post any problems on the forum.