Qatar 2022 organisers say they are "heavily dismayed" after it was revealed migrant workers employed to fit out the office block which houses their temporary headquarters have still not been paid.
Workers from Nepal, Sri Lanka and India say they have not been paid for up to 13 months' work after the contractor, Lee Trading, collapsed, according to an investigation by the Guardian.
Qatar 2022's Supreme Committee has offices in the Al Bidda Tower in Doha and has also been granted use of temporary office space on the 38th and 39th floors which were fitted out by workers from Lee Trading.
A statement from Qatar 2022 read: "We were heavily dismayed to learn of the behaviour of Lee Trading with regard to the timely payment of its workers.
"When Amnesty International initially raised these issues, we immediately relayed these concerns to the relevant authorities. We understand that the majority of cases have already been settled with employees either repatriated home or, if they chose to remain in Qatar, work for other employers.
"We strongly disapprove of the behaviour of Lee Trading and its treatment of workers and will continue to press for a speedy and fair conclusion to all cases."
Some 13 migrant workers have been left stranded without paperwork after Lee Trading's collapse and are now being exploited on wages as low as 50p an hour, said the Guardian report.
In May, Qatar announced an end to the controversial kafala system which ties migrant workers to a single employer and makes them surrender their passports to their bosses.
The International Trade Union Confederation has said that 1,000 workers have died in Qatar, including on infrastructure that would be used for the 2022 World Cup. It called the kafala system "a form of modern day slavery".