How do I increase the number of rings or length of time to answer my cell?

I'm new here and need help!  I've recently bought my Pixel 8 Phone, unfortunately I've missed the return date as I don't like it at all, should've stuck with Samsung!    I've had nothing but problems since day 1, have been on the phone daily with my provider, they were blaming everything but the phone, turns out it was the phone but they didn't believe me!

Anyway, I'm having problems answering the phone in the very short period I'm given!

So I need to increase the length of time/number of rings to answer my phone!  So, I'm hoping that someone could please help me, I'd greatly appreciate it, thanks, Susan