I'll recommend the hacker solution: first, buy and install your own meter, right after the power company one. It isn't expensive. Have it done by an electrician

I'll recommend the hacker solution: first, buy and install your own meter, right after the power company one. It isn't expensive. Have it done by an electrician. I got mine installed in my fuse box, a small 3-phase DIN rail meter (I'm in Poland and pretty much all modern hookups are 3-phase). This gives you a way to at least compare the official meter readings with an independent source. In my case, it showed no correlation whatsoever, and it turned out that the power company swapped the meter numbers between me and my neighbor. Second, most meters have LEDs that flash a number of times per kWh consumed. It isn't difficult to build a device that measures the time between those pulses and gives you energy monitoring. I built one and had it running for a while. It's an eye-opening experience, you'd be surprised how much energy some devices consume, and also how significant a constant power draw can be.