Remote working, a reduction in staff numbers and IT challenges have been blamed by the communications company Eir for disrupting their customer service operations.
During the pandemic, some customers complained of having to wait for periods of more than an hour to speak to customer service staff.
Last week, Tánaiste Leo Varadkar and Minister for Communications Eamon Ryan met both Eir and Vodafone to express their dissatisfaction with both companies customer care services.
Eir will appear before the Oireachtas Communications Networks Committee later today. CEO Carolan Lennon will tell TDs that Eir experienced several challenges during the pandemic.