Pathetic service at Momentum

I am so upset, my last working day was 3 October at my previous employer, a claim was put in with momentum for a funds at work payment at the end of October. At the end of November I called to enquire about my funds and the process I was told my bank details were needed, I then sent my bank details. Called a few days later got told the same 'details excuse.' I've proceeded to call them every day for a week now and each time get told the same story. I've sent my bank details to a few different email addresses now ( 7 to be exact) at momentum and yes I'm still waiting. Total pathetic service!!!!!!!