DStv bills pensioner two years later for terminating subscription

My mother-in-law and a pensioner had her DStv subscription terminated almost two years ago. DStv confirmed telephonically that they did terminate her subscription and that they also cancelled the debit order instruction accordingly. Two months ago she started receiving SMS notifications that her account is overdue with R132.50 and has been handed over to Vasmartt Trust CC for collection. When we phoned DStv about this the consultant told us the amount outstanding is for a disconnection fee... really?! two years later!!! This is absolutely unacceptable. DStv knows they are loosing thousands of customers to streaming services, and now they try to compensate on their revenue loss by targeting vulnerable individuals. This is pathetic!

Below is the SMS received: "Vasmartt Trust CC is authorized by Multichoice to collect the outstanding balance on your DStv account. Please pay R132.50 to settle your balance. You can pay here https://payat.io/dstv/***0 or call us on *** for payment options. Thank you."