Duplicate account

Last year they refused me to buy because of missed payments in December, I was told how my credit score was so low and can’t allow me to buy, I accepted it and let go since there are other options where they don’t care how low my score is. Now I receive an sms that my account has been handed over, mind you the account was paid up at that time. So I phone the number on the sms to query the account, gave him my ID number and he said there are two accounts under my name he will call his supervisor and revert back. So basically our information or details are not safe. Why are there 2 accounts under my name. Like you refuse that I buy now I have an overdue amount like really. Please sort this *****ulent under my name as I’m no longer interested. The rudeness of the customer service.