Wrongful Bad listing

We requested a Fibre installation for our house and due to Telkom's incompetence we cancelled. While trying to apply for finance our application was rejected due to the default record on TransUnion. On calling Telkom's call centre, we learned that we were blacklisted for about R200.00 (and some odd). We didn't receive any communication informing us to pay before taking the matter to Credit Bureau. This NOT acceptable because now our lives is at stand still for a mere R250(round figure). Somebody please advise because they told us they can clear it on their side but have to wait for about 7 days for TransUnion to clear my husband's name :-(