Billed for FREE phone, no feedback, rejected

I got a \FREE\" phone for doing an online phone transfer way back in December. Telkom then billed me for it. I disputed it, and had ZERO feedback from them, MONTHS later I find out it has been rejected with NO reason. It is impossible to get a hold of anyone who knows whats going on, I've had many promises that a manager will call me, but nothing. Dispute reference is ***6"