Up to 5,000 people are still complaining each week to the financial ombudsman about payment protection insurance, new figures show.

Two-thirds (67%) of all new complaints received by the Financial Ombudsman Service (FOS) between May and June were about PPI, despite the scandal appearing to have hit a peak around last year.

A year earlier, the ombudsman service said it was dealing with around 12,000 complaints a week about PPI, although the number of gripes it is dealing with about this type of insurance is still about 50% higher than in 2012.

PPI is the most complained about financial product that the ombudsman, which resolves disputes between consumers and financial firms, has ever seen.

Often, PPI was often added to people's loans and credit card agreements without them fully understanding what it was or even realising it was there at all.

Such policies are designed to help people repay their debts in times of crisis, for example if they become ill or lose their job, although in many cases, they were unsuitable for the people who took them out.

Some 56,869 complaints were made about PPI during April, May and June, according to the ombudsman service, which said: "We continue to receive up to 5,000 new PPI complaints each week."

Around 61% of PPI cases are currently being upheld in favour of the consumer, which is lower than an average of 65% seen across the last couple of years.

The service said it is seeing some cases coming through which involve policies sold in a wider range of contexts than previously, often making the outcome less clear cut.

It is also increasingly being asked to step in at a later stage of a dispute, including cases where it is the settlement, not the mis-sale in the first place, that is the point of disagreement between the consumer and the firm that sold the policy.

Last month a BBC investigation raised concerns that some PPI mis-selling victims could potentially have been under-compensated due to some fees and charges that were triggered by mis-sold policies being left out of compensation calculations.

However, firms spoken to by the BBC insisted they had made every effort to pay the correct amount of compensation.

According to data on the Financial Conduct Authority's website, a total of £15.1 billion has been paid out since January 2011 to consumers who have complained about the way they were sold PPI.