Wrong metre reading

I submitted the wrong metre reading on the 28th March. I received a bill today saying from the 1st March I used £859.40. Which is impossible!!! I checked and it turns out I submitted the wrong reading. I tried to connect the new reading and it won’t let me.

Hi! It looks like you have phoned in to get this fixed. Just to confirm that the readings have been changed to your correct readings and I have sent a revised bill.