pathetic service

My mum was recieving my late dad's pension fund and she passed away on the 24th of April, tried calling metal Industries benefit fund administrators contact centre numerous times, when I get to number one on call list or queue, they advise me to please call again later as they have high call volumes, and they disconnect the call, this service is pathetic, I cannot hold on the line for 20 or 30 minutes only for the call to be disconnected, as I am trying to the right thing by advising them my mum has passed away, please contact me urgently on *** or *** as I cannot be wasting my time and effort to contact you guys