CAPE TOWN (Reuters) - South Africa's civil servants union has teamed up with the government pension fund to pursue Steinhoff for around $1.4 billion of pensioners' money lost as a result of an accounting scandal at the troubled retailer.Steinhoff, which owns more than 40 brands including Poundland in Britain, admitted "accounting irregularities" last month, sparking an 85 percent share price slide that wiped more than $10 billion off its market capitalization.This has left investors such as the Public Investment Corporation (PIC), which has around 2 trillion rand of government employees' pensions under its custody and is Steinhoff's second-largest shareholder, nursing big losses."The Public Investment Corporation is considering several options to ensure that its clients' interests in Steinhoff are secured," said Deon Botha, head of corporate affairs at PIC.Steinhoff faces a liquidity shortfall following the accounting problems and on Monday it sold a stake in investment firm PSG Group for 7.1 billion rand, after securing 60 million euros from South African lenders the previous week. But roughly 2 billion euros of the company's 10.7 billion euros in debts mature this year and it has called a meeting with some of its European-based creditors on Friday.Creditors have been joining forces to position themselves for a potential debt restructuring, people close to the matter said this week."We want to recoup as much as possible and that is why we have an agreement with PIC to have a joint class action to make sure that happens… to try and recoup the losses of those investments," Tahir Maepa, deputy general manager at the Public Servants Association (PSA) told a news conference.PSA said documents it had obtained from Steinhoff painted a picture of a company with a "complete collapse" of corporate governance and "real maladministration" of its tax systemSteinhoff said auditing firm PricewaterhouseCoopers (PwC) had been hired to conduct a full forensic investigation without limitation, as the board sought to uncover what went on."When we have the results of the PwC investigation, we will take appropriate action against anyone found to have been involved in maladministration and dishonesty, it said. "Steinhoff is unable to comment on the merits of any legal action that is not before us," it added in response to questions from Reuters.Steinhoff shares fell as much as 8 percent and 6 percent in Johannesburg and Frankfurt respectively on Thursday, before closing the day down 1.1 percent in Johannesburg and down 3.2 percent in Frankfurt. ($1 = 11.8781 rand) (Reporting by Wendell Roelf; Writing by Tiisetso Motsoeneng; Editing by Jason Neely/Hugh Lawson/Alexander Smith)