Debiting of account without authorisastion

On 31 March 2015, R299 was debited from my bank account. I called Digicash to enquire and was addressed by Mariah who said some company called T-direct had instructed them to debit my account. I called this T-direct and was eventually attended by a Kael who asked for a reference number, which I gave him (1W8B5). He investigated and got back to me saying it belonged to some person I don't even know. I want my money back. You people must sort this out with T-direct and give my money back. I will escalate this matter. surely this is *******.