Loan Finder SA **** pleas help

After my account was debited namouras times and I did not agree or sigh any thing for this debit orders I kept on reversing them a couple of weeks ago I received a mail from a lawyer stating I must pay R 950.14 and something or I will be black listed what is wrong with this people how are they still in business *****ing from the poor if I don't pay them can they black list me for not paying this I received 2 emails with deferent amounts see below. what can be done about this pleas help any advise

Dear BRANDON Cory ARREARS ON ACCOUNT NUMBER ********** 21 IDENTITY NUMBER Please be advised that your account is overdue as at ********** 9 Kindly settle the amount of R 950.14 which is payable within 2 days from date of receipt hereof. Should you not make payment within the 2 day period your account will be subject to further internal collections process in order to recover the arrears. Please deposit payment into our bank account: Nedbank Corporate Client Service Account Name: Cell C SP (Pty) Ltd Account Number: ***Branch Code: 145 405 Quote your Cell C number as the reference when payment is made. Submit change of personal details to ********** Easy Pay Reference Number: ****************** Should you have settled this account in the interim, please ignore this demand and submit proof of payment via fax to ********** .

Kindly find attached copy of the agreement you entered into on 2018/07/03 with LOAN CHOICE SA for their convenient service package. I wish to bring to your attention that your debt has been ceded to Lifestyle Legal and your outstanding account which amounts to R1713,33 has become immediately due and payable to Lifestyle Legal. Kindly see clause 10.6 Locus Standi in the attached Mandate.