Vodacom - failure to cancel computer package deal

On 12 September 2020 my dad, a pensioner, bought a computer package deal from Vodacom through their telemarketing - Order No ***+1 and Invoice No K***. The computer was promptly delivered the next day at their premises. My dad could not afford the monthly payments as he is a pensioner and promptly cancelled the deal the same day by phoning Vodacom - the package was never opened. Until today, more than 3 months later, and despite numerous calls to Vodacom, which calls were also escalated, the package was never collected and the deal never cancelled, resulting in the monthly payments being collected from my dad's bank account. This places my dad in a dire financial position and my calls to Vodacom on his behalf resulted in the same lack of any action, leaving my dad in a dire financial position!!