*******ly Debiting My Account

I had cancelled my Netstar contract over 18 months ago with Netstar due the bad service that I was receiving and went to Bidtrack, which I must admit is an awesome company to deal with. On the 01 June 2015 a debit order went off my account. Netstar debited me for a full month's premium. On the 02nd June I called and chatted to Vaneshri and she assured me that there was a problem with their billing system and would get credit control to resolve the problem. The credit was not reflecting, so I called on 22nd June 2015 and chatted to Samuel who once again said they have corrected the matter and the funds would reflect in 2 days time. On Thursday I called back and was told between Thursday/ Friday this would be resolved. Today is the 29th June and the credit is still not reflecting. I am sick and tired of calling and dealing wiith these *********** people. Really speaking I do not have a contract with Netstar and they are *******ly debiting my account. I am at my wits end trying to get this resolved.