Bad customer service

Bad customer service SABC TV licence. I've paid my TV license 06/10/2016 and I've send them proof of payment but with incorrect reference number which I saw same day and resend the correct information. I've called them 1st time on 22/12/2016 and last call was on the 26/06/2017 still confirmed they can see the payment but will refer to teamleader to send yo the relevant department to rectify the payment. But up until today this problem has not been resolved instead I get a reminder that I owe money. I haven't paid this yet until this is resolved. This is going to affect my credit record for people who are so *********** of doing their job. They have handed me over to Debt collectors.