Unauthorised debit order: Cell C

I recently had a new debit order implemented on my bank account, from Cell C. An unauthorised one, as it was post the new DebiCheck system which is supposed to safeguard against it. I have visited my local Cell C shop, sent documents, e-mailed, phoned, but to no avail. I simply cannot be assisted at the correct department. My reference number is useless as nobody can find it on the system. The debit order keeps increasing in value and each and every time I have to incur the time and cost to have it reversed. When I phone I get transferred between several consultants and departments, until I finally get lost in the system: hearing background sounds but not being assisted.

My legitimate contract's debit order is not the problem. That I'm being billed for someone else's contract, that is most definitely the problem. All my banking fees for debit order reversals and my own debit orders that bounce because of this, who will cover those costs? Who will cover the time that it takes me every month to go and reverse this debit order that was loaded without my consent? Either the DebiCheck system is flawed, or Cell C does not care to abide by it.

I tried to resolve this internally with your methods at Cell C, now we'll see if we can resolve it here.