Why are my monthly charges so high since I entered a meter reading incorrectly?

It’s not based on estimates as gave manual , the readings don’t reflect the thousands of kWh they are saying for too months ! 
this is more than my gas & electric combined for the year , I’m also still in a fixed rate until next month , two people in a small house , no way it’s 900 a month , which would equate to over £10,000 a year ! Ridiculous! 
mice checked meters & readings , definitely an error since smart kicked in maybe they added my readings , smart and the meter readers figures all together in error? 
but I can’t seem to get hold of OVO to ask for a a new rengenerated bill based on the actual readings 🙄

Would it be possible to post a screenshot of your meter readings page here too, @Sam 85?

This might help us figure out what’s gone wrong and give more tailored advice to get things back on track.

In March I entered the gas reading in the electric read by mistake, I rang them with the correct reading, they sent a meter reader who also gave them it , but from the 31 st March they have charged me over £30 a day when in reality I’m using about £1.90 a day as the reads would suggest, I think this is probably a human error and all the kWh have been added wrong ? I use about 320 kWh a month now for those 2 months and a day they are saying I’ve used over five thousand by it’s obviously an error as it doesn’t add up . 
thank you 

I’ve taken lots of photos on different days the readings seem ok ? It’s the working out the kWh usage that’s all wrong ? It went to billing so maybe it was there it went wrong ? 
maybe all 3 reads : 

mine 

meter reader 

smart .. have all added kWh wrong ?

I’m guessing the incorrect manual reading on the 31st March may have caused the system to throw a wobbly. 

Is your smart meter now sending regular readings? Most meters can be set to send readings automatically at a range of intervals. Ideally readings every 30 minutes give the most accurate picture of energy use and this data is usually sent by the meter each day (although some meters are set to only send once a month).

Hi near Murphy 

yes I think you are correct with March reading but I did ring about the error and gave a correct reading and readings in April & may along with the meter reader they sent , but never applied any ?? 
my smart meter started sending signals a week or so ago , it send them every half hour .

there’s clearly an massive mistake and I haven’t been able to contact properly to sort this .. meanwhile it’s showing I owe nearly £1700 for just over 2 months electric .. normally about £58 - £60 

I have been trying to get this sorted for a week now to no avail ?