Customer support Call center number

Im sorry but please fix your Call center telecoms system, ive been trying to get through to digital banking for the past 2 days, 20mins at a time basically just wasting my airtime, when I do select other options like ***** or fixed assets I get through and speak to lovely agents who try and point me in the right directions and suggest which prompts to press but you literally just end up listening to on hold music on loop. I can understand that the lines are busy but I can't be the only one that's struggling like this. I've tried multiple times and multiple options from different phones even just to be sure. This process is shocking compared to other providers to be honest.