Poor service and credit reporting

I have 2 loan and a vehicle finance accounts with nedbank which i openned to build a credit history and improve my credit score, my problem is Nedbank isnt helpfull as it does not update my payment profile with credit bureaus and today i called them and the person i was talking to is clueless, he kept me on hold for 10 minutes to come back and tell me my accounts are paid on time, he put me on hold again for another 10 minutes. A total of 29 minutes was spent without a resolution and he offered to send me statements which i hava access to on my banking app 24/7. I paid on the 15 of april even today 02 may transunion still say not updated. This has been happening for almost a year. I just got a call from nedbank advisig me to log a dispute, why cant they just follow up with credit bureaus. So according to nedbank i have to lodge a dispute with credit bureaus to have my payment profile updated. I wonder if i could skip 2 months if it wont be reported as payments are not reported.