Non excisitng customer care for canceling a service

<p>I joined iBurst for their good rates.</p> <p>I cancelled my service in March ,and was told that i had to give one calender months notice and that I would still have to pay another month.</p> <p>I reversed my debit order and stated clearly that i would be willing to pay a pro-rata amounts as per when i joined.</p> <p>They have continued to debit my account,and another amount was taken off in July.</p> <p>Emailed Donovan at retentions on 6 June,till date no response.</p>