Four days isn’t a long time in this situation - it might take weeks for everything to settle down, but not usually more than six. There’s a detailed article explaining what happens with new meters here: OVO SMETS2 (S2) Smart Meter installation - Member Guide | The OVO Forum (ovoenergy.com). It’s admittedly getting on a bit, but apart from minor details, it’s still a good guide to what to expect.

Bottom line - be patient. If things don’t improve in the next few weeks, contact Support.