Scottish Widows admits its service standards have dropped in the wake of the Budget and is training extra staff to address the problem.
The insurer came under fire last month for delays in carrying out open market option transfers and answering telephone queries.
At the time sources said Widows was taking 23 working days on average to carry out an Omo pension transfer and 25 minutes to answer calls.
Complaints about the provider have continued to flood in and the latest data seen by Money Marketing suggests Widows is now taking 30 days on average to process transfer requests.
Scottish Widows retirement proposition director Stuart Paton Evans admits the firm has experienced a fall in service standards in recent months.
He says: “There has been a drop in service standards and that is something we are addressing.
“It has been driven by a couple of factors. The tax year-end was very busy and the Budget announcement has also seen a significant increase in the number and complexity of calls we receive.
“We have recruited and trained a number of additional staff but because of the complexity of the Budget changes we need to take the time to make sure our customers are supported.
“We are working to get our service standards returned to the levels advisers and customers would expect.”