Research says late-night online access to credit means people borrow more than they can afford to repay.Read more
Personal finance reporter
BBC Radio 5 Live
Complaints against payday lenders have soared to a five year high, the Financial Ombudsman Service has said.
Complaints against banks were up 8% too last year.
Caroline Wayman, chief ombudsman and chief executive of the Financial Ombudsman Service, tells Wake Up to Money that financial services firms need to "take the lessons from the complaints that we see."
"One of the key messages is about listening to waht happens, listening to your customers and learning from complaints that things don't keep repeating," she says.
A Wonga customer says she has little sympathy for the payday lender after its collapse into administration.