My iPhone (XR yes I’m cheap and old lol) started to freeze up last night from what I thought was from being almost out of storage. So I did a restart on it and it came on and up very slow but I noticed some of the app were missing or not fully installed so I did another restart. Finally it comes up slowly and when I entered the password it would begin to reboot and do that very slowly for about six times. I decided to charge it overnight and try again in the morning. So the next day it was working better so I transferred some of the pics to free up space and hopefully help with its performance. Shortly afterwards I noticed I can no contacts and can’t find a way to restore them anyone with a suggestion? I don’t ever recall doing a backup either. Apple customer service was shocked as well when I called them. TIA