SERVICE ABSOLUTELY SUCKS

After a number of WhatsApps and emails, Supersonic continue charging my bank account R794.99 for fibre that was cancelled by WhatsApp on the 23rd June. Subsequent emails dated 29th June and 27th August have neither been acknowledged nor responded to, As my bank tells me that only Supersonic can cancel/return the debit order, it appears that now the only thing I can do is close my bank account.