Dishonest behaviour to say the least!

I cancelled my sons subscription 3 years ago, as I pay for it via debit order. The snag was that I had no right to cancel it, as its in my sons name, which they failed to tell me. They carried on debiting me until I closed my Nedbank account in March 2022, and they have now handed my son over to a collection agency. They refuse to show him the contract and they refuse to deal with me. I am appalled that in this day and age, companies can conduct themselves in this manner. I truly hope they go bankrupt!!!!