Incorrect Billing for a guesthouse

We cancelled one of our decoders on the 18th of April 2017. It took several follow up e-mails and more than a week before it was cancelled. For the next few months we haven't received any statements. In September we received the statements for the previous few months and I noticed that they still charge us for the cancelled decoder. I raised the issue several times and they told me I did not answer the e-mail to confirm the number of decoders. As a business we have to keep all our e-mails and I definitely did not received that e-mail. I raise the issue now 11 times and request a supervisor to phone me. Supervisor hasn't phoned me. Note, there is no number to phone for commercial billing queries as they only work via e-mail. Shame on you multichoice for overcharging and such bad customer service. I consider cancelling all my DSTV decoders and I will definitely raise it at the next Pretoria Breakfast Association meeting for warn other guesthouses.