Unfairly listed

I don't know where to start with Justine, I had this problem since from 2021 till today which they refuse to solve ,I payed my order November 2021 , I have proof of payment of that transaction. I made a little mistake a didn't write the correct reference because I was struggling to make payments. But then I called to report that .I made payments can they allocated them correctly. I sent multiple emails, called them many times. But they ignore me till today .

But what they did is to list me on sent debt collectors to call me even my mom .worse part my mom didn't order anything but only registered with them . Then I told those debts collectors I don't owe Justine I even sent my proof of Payment. Instead Justine didn't stop there .I can see myself on credit score that I owe them .they have ruined my credit score . When I asked few people to assist me .they getting responses that I have outstanding balances with them and that I should pay legal fees . I really need help where I can report this .even last week I did try to email them .there's no response from them .instead one lady from their credit control department told me I can even report them at credit bureau it's fine . They not willing to solve my problem its been Teo years now .I need to know where can I escalate this matter so that they clear my name .where is the money I payed them .if I owe them