Billed for cancelled contracts by Telkom

I had long problem trying to cancel 2telkom contracts. After submitting forms both at Telkom's shop in Galleria and via email, Telkom ignored my request. At beginning of March I submitted my complaint to this site, and soon after that they terminated the service, both SIM cards indicated \NO SERVICE\". I'm greatful for that at least something was done. However Telkom has continued to debit my account for both contracts. The latest invoice indicate that I have been billed for period ending on 30 April 2016 for the iPad and billed for period ending 31 March 2016 for the data contract. For the entire period of March both these SIM cards had no service or no reception. I need Telkom to refund my money back not only for the last invoice debited also for the period dating back to the time I submitted by cancellation form at their Galleria shop in respect to the data contract.<br> This type of service is unacceptable and can not really be tolerated. I need someone senior to contact me and advise when will I get my money back."