Time waiting to speak with someone is ridiculous

I find that each time I make use of the 10210 call centre, I need to put aside 3o minutes of my life before I can expect to be speaking with a person. Now again after 35 minutes on hold, I had to put the phone down and give up.<br> How long is acceptable for a client to wait on hold for a consultant?<br> If you have higher call volumes continuously, then you need to hire more consultants.<br> Issue with Billing still not resolved....<br>