I’ve not had a landline since 1998 but numbers change too frequently to block. It has tapered in recent months.
I’ve been tempted to tell them ‘I go by Mario now. If you want the parts you paid for come get them.’
Recently I’ve been getting spoofed number robocalls from overseas for someone else who presumably had the number before Maria (some older gentleman called a few times for her birthday - I called him back to tell him it wasn’t her number anymore). Either it goes to voicemail (which they don’t realize is voicemail) or I answer and immediately hang up.
I don’t answer the phone unless I know who it is. Robo calls seem to go in cycles. I can go a week or so without them, then get a few a day for a while. It hasn’t been bad enough to limit incoming calls to favorites or all contacts. I just tap the power button to mute the call. If it is important they will leave a message.