My statement page

When I check my statement page it just lists loads of debits for random amounts all on October 1st. Could someone explain why this is and check my account is ok please?
Also, on the energy usage graph the gas for June is as high as it can go. This doesn’t seem to match the readings?!
Is there any way to contact you privately rather than a public forum?

@Sara27 We recently re-versioned bills on your account going back to December 2016 so the statements you have received are credit notes cancelling previous bill. This is essentially because some of your readings were reprocessed by our system, apologies for the confusion. It has not changed the amount you have been charged.