Amigo PLC (LON:AMGO) said the rate of complaints has continued to balloon and it is trying to extend an agreement with the FCA to clear the backlog.
The lender agreed with the financial watchdog in May that it would clear a backlog of 9,000 complaints by June 26.
However, the guarantor loans provider wants more time and it is looking to extend the deadline.
It added it continues to assess each complaint on a case by case basis to ensure fair outcomes for customers.
Two weeks ago the firm reckoned the extra costs could be at least £35mln, so it scrapped the final dividend for the year to March 31 to save cash.
Shares tanked 27% to 7.19p early on Monday.
Published at Mon, 22 Jun 2020 07:35:00 +0000-Amigo wants FCA deadline extension as complaints continue to soar