Utter incompetence; R39K debited from account erroneously; 6 days later, nothing's been done

Utterly unacceptable incompetence by this company. I signed up on the 1st of June. This company goes and debits me on the 2nd of June for three months in one go. Three months. Over R39K in one debit. Okay, a mistake by the sales person and whoever she did or didn't contact about this in the accounting department. And so I immediately let them know. It is now 6 days later and nothing has been done. Nothing. They've not refunded me, nothing. Utter disinterest. Utter incompetence. I've contacted their support numerous times. Nothing. I keep getting told it's being escalated. Nothing. R39K removed out of your account when you weren't expecting it could put you straight into overdraft or straight into the red and affect your credit rating and other debits. I've told them this over and over. Nothing. Silence. No refund. No escalation. Just utter disinterest and incompetence. This is not just a little R300 error. This is R39K. When your idiot finance department makes a mistake like that, you pull out all the stops to fix it immediately. Not these people. 6 days later, nothing's been done.