Credit Vetting Incorrect

On the 15/07/2019, i app**** for a new contract, then on Saturday i receive an sms saying that my application was declined, stating i have accounts in arrears and my credit score is low, i just check my scoring on trans union is at 71%, and i do not have accounts in arrears, i can not get approved from bank and Telkom says i have accounts in arrears, can you please investigate and it is not the first time applying for a wi-fi router and they said my credit score was in arrears, when i showed them my credit score they approve it. had to cancel because of poor service.