OnAir TV dstv explora deal

Last year 2020 I created an account with OnAir TV for the DStv explora deal. When the explorer got delivered I was not home but a friend of mine was. The guy that came to install it asked if he should add the recording functionality which I asked why is he asking as I assumed it comes with the explorer. He then told me it was a paid for service that costs R100 per month then I told him not to install it I will cancel the contract with OnAir TV, which I did. I was then charged a cancelation fee which I paid via a link they sent through an sms. So all that happened late last year 2020 where they collected the explore and I paid the cancelation fee. Now beginning of this month March 2021 I get an sms from OnTv saying I owe them R326 and I need to pay it immediately with their banking details. I immediately sent them an email asking them about this amount I owe them, they rep**** saying they have received my email and someone will contact me soon. Then month of March ended without anyone contacting me then I noticed that amount has been deducted from my bank account. I have emailed them saying I will be reversing that money. When calling them you end up holding the line the whole day. The whatsapp service is useless.