Complaint Against a Service United Kingdom

WLY Complete Save — Unauthorised credit card charges

For the last maybe 6months £15 has been taken from my account, I never signed up for anything to do with this company and I have complained twice and nothing has happened! I am 18 years old and unacceptable as I don’t have the money to spare. I’ve been told to login to my account and suspend the transaction but I haven’t got an account and on my banks account I can’t cancel it from there. Get this sorted