SuperSonic ignoring that i have made payments after i have shown them bank statements! Sneaky!

Supersonic have truly disappointed me this time. January 12th i called Supersonic to cancel my subscription with them. They asked me to send an email to the cancelation department. I sent the email for cancelation and informed them that i will be cancelling my debit order for March 2022, since canceling in January and needing to give a whole calendar months notice as requested. March 2022 i receive a failed debit order from my bank and got a penalty from my bank, this is after letting them know i will cancel the debit order. A lady called Admirer called me to find out what going on. The ensured me that if i had any problems with my services i could let her know and shell sort it out. I then asked her why i am over R600 in arrears since i have made my last payment in February before cancelation nd was told that billing would contact me. Eons later, billing finally called me and they insisted that im in arrears, after i explained that this is an error on their side. The failed debit order was for March and i already paid march. In May 2022 i emailed them again to cancel, this time for good. I made my R399 payment and even paid for March since it wasnt cancelled and reactivated my Admirer. Last month i receive a bill saying i still owe them money after i have made last payment in June as that was my last month. In July the courier shows up with no bag for my parcel, not knowing what arrived at Supersonic. I had to pay the R250 for the courier anyways. I want this to be sorted out as i have all the proof of my payment and Super Sonics billing department doesnt get back to me and i refuse to pay anymore, i would not recommend Supersonic to anyone, im at Mweb MTN with no issues what so ever! Sad how they treat and almost 2 years client. I will expect a call FROM YOU. GET YOUR PAYMENTS FROM ME IN ORDER AND SEE YOUR ERROR!