Can't get through to call centre

I've called everyday for the past 5 working days 3 times a day and my call has not been answered not even once. I can't be on hold for 30 minutes or more, I've wasted so much time and missed so many business calls because my line is busy while trying to get hold of CIPC. They say I need to resolve my issue within a certain number of days but how do I do that if I don't know what the problem is with my submission.