A banking group has been taking hundreds of complaints a day from customers who are upset at being charged high and unexpected fees by payday loan middlemen.
RBS, which also owns the NatWest and Ulster Bank brands, has been receiving as many as 640 calls a day from vulnerable consumers about attempts to charge fees on their accounts.
It has seen more than one million attempts made by payday loan brokers to claw money out of people's accounts in the space of just one month.
Senior ombudsman Juliana Francis said: "It's disappointing to see that more and more people are being misled into thinking that these credit-broking websites will get them a loan. In too many of the cases we sort out, no loan is provided and people's bank accounts have been charged a high fee, often multiple times."