Bad service

My dad was having several phone contracts with Vodacom, he finished paying for contacts, they kept on delivering nee phones to him, he went to Vodacom to tell them that he doesn’t want the phones anymore because he still got three phones already from them, the did not cancel the contract, they keep sending airtime, he asked them to stop, but they still do send airtime and debit his account. Vodacom is taking advantage of old people,