Loan Detector Notice of Demand!!

HELLO PETER please assist me. I went online looking for several loans of which Loan Detector was one of them. I never app**** for a loans although I sent my details to them after which debit orders have been made on my account. I have been reversing them because according to me I didn’t have any agreement with them on any of their products and neither have I spoken to any of the consultants in that company in relation to any deductions on my account or the products they are selling. They have now sent me an email of Notice of Demand for the amounts I have been reversing?