Improper Debit of Account

<p>So I changed my address from one town to another, after battling to do it on the website an agent called me to help with the change of address. The new amount was agreed upon which was less that what I previous paid so they would debit my account less the extra that I paid the end of April for the month of May. All was fine untill MiWay decided to Debit my account again on friday with the new new amount and now they want bank statements from me to show it has not been reversed. How is it not possible for them see if they have refunded me on their side? I was told they will call me back but still waiting.</p> <p> </p> <p>Regards</p>