Charged me for a early debit Order

SO in December 2017, on the 23rd MiWay debited my account , Number one my debit order is on the last day of the month as when my salary is paid in to my account, Number two when I tried to phone them to reverse the payment they said they can not do that, so I went to my bank and they reversed the debit order for me, then I received a phone call from MiWay saying that I will need to take my car to be resubmitted or reevaluated and start as new on there system I argued that this is not correct as they where in the wrong and they broke contract , they call centre agent was very helpful and said yes it was MiWay's fault and we arranged a debit order date for the 10th of January, on the 10th they did debit my account but with a much higher amount then normal so I will need an explanation and a refund , as for trying to phone them and to get an explanation they blame me for this and if so I will have to go to the ombudsman as I have done so in the past for several over companies.