Help please

Hi I am with SMARTY without auto renew but my plan ran out by 1 day over.

I logged in to my dashboard.

I find I need a new SIM !!!! Why couldn't I just buy a new plan.

I have ordered a new SIM. BUT now I am told I have no service for now and when I get my new SIM in a few days I will have a new number 😱. 

What???

Can I request a PAC - which will be from Smarty because I am already with them - and use the PAC to port my existing number to the new SIM? All pointless but will that do it?

I must keep my existing number. 

Question 2. While I wait for my new SIM, will this my existing number still receive incoming texts and calls. 

Thank you if anyone can tell me