Legal

This company called me concerning the credit, telling me that they can help improve my credit score. I gave them my banking details, after that I realised that whatever service they are trying to offer me is something I can do on my own. I told them that I don't need their services but they billed me. So I am now in need of refund because their services are not for me. Calling them is a waste of time cause there's no answer. I emailed them and they asked for my ID and bank statement and I gave them. But now they are quite