Critics describe the flagship benefits scheme as a ‘shambles’.
Some 1.3 million calls to the Universal Credit helpline were abandoned over a 12-month period, according to figures released by parliament.
Christmas - the most wonderful time of the year for many, but not for everyone.
MPs are calling for the six-week waiting time for universal credit to be reduced to a maximum of one month.
Iain Duncan Smith has called for the Universal Credit waiting time to be cut from six weeks to a month.
The Archbishop of York has called on ministers to cut the "grotesquely ignorant" six week waiting time for Universal Credit payments.
Ministers are ready to reduce the waiting time for Universal Credit payments following an outcry from Tory MPs, it has been suggested.
Ahead of its roll-out in Manchester, some Universal Credit recipients describe feeling "trapped" as they wait weeks to receive benefits.
In a symbolic victory for Labour, MPs have also backed a motion from the Opposition party to pause Universal Credit.
Tory divisions over a controversial benefit reform could be exposed in a Labour vote in the House of Commons on Wednesday.