The Financial Ombudsman Service received 13% more complaints in the first half of this year than in the previous six months.
The Ombudsman took on around 170,000 new cases between January and June, and saw a rise in complaints in almost every product sector including PPI and banking.
Nearly 250 companies feature in the complaints data published by the Ombudsman today, but two-thirds of the complaints received in the first six months of the year come from just 10 businesses.
Bank of Scotland tops the list with 20,541 new cases, more than 17,000 of them relating to PPI.
Lloyds, Barclays, HSBC, NatWest, Santander and Nationwide also feature in the top 10 alongside credit card providers Capital One and MBNA, and insurance firm Financial Insurance Company.
There were more than 90,000 complaints about PPI, making up more than half of all complaints to the Ombudsman.
That number is expected to rise following the launch of the Financial Conduct Authority’s (FCA) campaign to highlight the August 2019 deadline for making PPI complaints.
Complaints about banking and credit were up by 12% to around 47,000. Within this, consumer credit complaints alone were up by nearly a fifth to about 15,000.
Caroline Wayman, chief ombudsman and chief executive of the Financial Ombudsman Service, said: “We've seen more complaints about most types of financial products in the first half of 2017.
“The FCA has just launched its communications campaign, which highlights that consumers have until August 2019 to make a complaint about mis-sold PPI.
“While we still don’t know what impact this will have on our workload, today’s data shows that PPI complaints are already increasing.
“It’s free to come to the ombudsman – if you’re unsure what to do, get in touch and we’ll see if we can help.”
Consumers with a complaint to make are advised to contact their bank or financial service provider in the first instance, giving them a chance to put things right.
If the business doesn’t give you a satisfactory answer within eight weeks, then it’s time to get in touch with the Ombudsman.
This can be done online or by calling 0800 023 4567.