Hi. I ordered my iPhone 16 online and during the purchasing process, I included my PAC code, number and a switch date (Monday) to keep my current number. 

my phone came today, earlier than expected, and I attempted to switch number today via e sim, however I deleted this as I thought it may cause complications as two numbers were linked to my new phone. My old phone service is nonexistent and to access certain apps and mobile banking, codes are being send to my old number. 

will my phone automatically connect to my old number on the Monday as requested in the purchasing process. Or have I created an entirely new issue.