billed after cancelling and paying up the ccount

I would like to lay a complaint against Autopage Cellular. I have cancelled my contract in April 2015, paid up all outstanding amounts, and yet I was billed for May and June 2015. I logged a query with the reference 807243 in the beginning of August after noticing this from my credit check report. Until today this has not been resolved. I enquire about the progress in August and I was told that they have submitted the request to update my credit status and I will receive a confirmation letter. To my surprise when I checked the report again this month Sep 2015 it still reflect the credit. Again I called them to understand what exactly is happening and They told me that my query was closed and failed to tell me why it was closed and they will reopen it. Instead of resolving this issue all I am getting is bad attitude from their legal department.<br> As a results I am unable to apply for a home loan<br>