There is a fault with the App, which by now almost everyone knows about. You can still use your IHD to show consumption and the latest meter readings which you can send in to SP to get an up to date bill. There is no reason for costs to be tripple what they were before smart meters etc, maybe your estimated bills have been too high?
I have phoned Scottish Power four times asking why the app has stopped showing daily and hourly consumption, each time I have been fobbed off with excuses of ‘They are working on the app’, ‘We will look into it. ‘They are working on WiFi in your area. Does anybody really know the truth, it was really useful in pinpointing thirsty electrical equipment. And surely that is the idea of the smart meter.
I have the same problems,l live in the North East of England. I too rang and talked to someone in chat about this the problem with the app . I got no good answer, now I send meter readings every time I use my iPad as the meter readings download automatically to my iPad when I open send new readings. This probably does not give them more work but it makes me feel as it might .
Keep pluging away that them