Intermittent Incoming Calls Going Straight to Voicemail with No Ring

So I have (had) been having this issue of all calls going to voicemail when I went from my Apple Iphone 14 pro max to my S22 Ultra, all of the calls on the s22 ultra were going straight to Voicemail if someone called. 

I checked all the usual suspects, spam blocking. call forwarding, DND, all of it was correct and not blocking the calls. I even tried turning off wifi calling and bluetooth like these forums suggested. 

Additionally, I spent 4 to 5 hours at the store trouble shooting the device and we finally came to the conclusion it was the line not the device. because when we put the SIM card in another phone the same results happen all calls went to voicemail. if the call called right back the device would ring. 

The store manager called tech support and put a ticket in and they were going to take 3 days to get to it, which was totally unacceptable. So she told me that is extreme cases what she would do to correct a problem with a line is the following. 

She would cancel the number on the mobile phone account that was giving problems and then reinstate it 5 minutes later and that would clear the issues with the line because you are technically starting over fresh again. 

We did this today with my line that kept going to voicemail and trust me I was suspect of the idea. But then after we went through the process which took a total of 45 minutes at the store it was fixed and I have had no issues since.  

So as a last result I would recommend doing this to clear an issue you are having with your line if you have ruled out that it is NOT the device.

Hope this helps.