Apple Sauce

I have an iPhone X that works fine except for two things. One is that if you leave a voicemail for me, it may not show up on my phone for four or five hours and it arrives with no audible alert. I just find it there, often way too late to return the call. The folks at Apple say this is a problem that can only be solved by my cell service provider and my cell service provider says this is a problem that can only be solved by Apple.

The other problem is that if someone sends me a text message, I'd like to have my phone chime or bing or make whatever sound I have it set to play whenever one arrives. And it only does this once in a rare while.

Last week, I was at the Genius Bar at my local Apple Store finding out that, as expected, what it would cost to make my non-functioning iPad function again was not that much less than what it would cost to purchase a new one. (I had already been told that by a trusted independent fixer of iPads who also said, "You have an antique. It might take me weeks to get the necessary parts. Take it to the Apple Store.")

While I was there, I told my assigned Genius about my iPhone problems. He told me the voicemail problem could only be solved by my cell service provider. And he checked all the settings and couldn't figure out why I wasn't hearing a tone of some kind with every text message arrival. Because he didn't know what else to do, he gave my phone's speakers — and while he was at it, microphone — a thorough cleaning and he did improve the sound. But I still usually near nothing when a text arrives.

I've Googled all the online info there seems to be that one can Google to find out about this problem so I'm not asking anyone here to do that for me. The Genius (of course) suggested the same solution I used for my iPad problem, which was to just buy a new one. I don't want to do that. Does anyone here have any other thoughts? Aside from switching to Android?