Poor service from Telkom Mobile

I recently ended a contract with Telkom Mobile in which I overpaid the outstanding balance to close the account. Since 22 December 2015 they have not refunded me. The query on their side says ''Resolved'' and is now conveniently closed, however consultants confirm the amount due went through then was reversed FOR NO REASON then the whole case closed and now radio silence. I've been calling for about a month but get told the same story ''someone will call/email you'' apparently by the case manager Zanele Bukhali who closed this case for no reason. Still waiting and STILL wasting my airtime getting them to do their job! Pathetic service all round!