Debit order on my account by TLC Finance

I do not remember applying for this or even agreeing to such. An amount of R394 was deducted from my cheque account. I am not interested in loan finder to find me a loan. I phoned this morning to cancel this service with immediate effect but there was no answer. I would like to receive a letter that this service will be cancelled immediately. I cannot afford for this amount to go off my account