Apparently, after several hours on the phone this morning to Utilita (and don't even get me started on how difficult it is to find a working phone number), it turns out after resyncing the account, the network signal from the meters isn't powerful enough to reach 12 inches away, let alone through a wall or across 9ft of empty space.
Surely, with the ridiculous costs, PAYG users are lumped with compared to DD customers, you could supply a little more power to the network cards in the meters so they actually work? Otherwise, what's the point in an IHD?
In all honesty, I only came to Utilita because of my solar panels, (which is still debatable if they actually work with SMETS 1 meters) but considering what a s**t show the experience has been so far, I'm starting to wonder if I made the right choice?