Supersonic Provides No Service: Only Anger, Frustration and Lies

Where do I begin with an explanation about this travesty of a company's ineptitude? I ordered lte from Supersonic in July 2020, the router wasn't working and it took 10 DAYS for someone to get back to me and rectify the situation. Come early August (approx Aug 5th, 2020) and I have yet MORE connectivity issues. The staff at the call center either don't care or are GROSSLY unequipped to deal with certain issues. On August 8th, 2020, the speeds I was receiving were ********** (I was paying R999pm for a 400GB package), all I was getting was 4mb. I was paying R1000 for a 4mb ADSL line essentially and speeds (area dependent) were never disclosed to me. After being transferred from agent to agent and being on the call for 2 HOURS, I was LIVID and decided to cancel. I had been using their service for approximately 3 days at the point. After cancelling my account, NO ONE got in touch with me and my LTE was available for 2 MONTHS until it was cancelled. Supersonic still found it fine to do a DOUBLE deduction from my account and as of OCTOBER 30 2020, I am now fully cancelled YET this abominable company decides to send me reminders for payment for the month of NOVEMBER? I have addressed this on their public Facebook page, as I WILL get lawyers involved if any money is deducted from my account in Nov. I have also received an email, reminding me of apparent payment owing to them in November. I have spoken to a call centre agent about this and have been "assured" that I won't need to pay. If I don't need to pay, why are you sending me reminders to pay for a service I am no longer using? Why is it so difficult for this *********** company to handle very basic affairs? I will NEVER, EVER recommend this "service provider" (a hilariously misleading title) to provide service, other than handing over headaches, stress, anger and frustration. And double deductions of money without warning.