Alexander Forbes Unclaimed Benefit will Remain Unclaimed Due to Non-existing Service

One of my clients requested my assistance with an unclaimed benefit under Alexander Forbes's Pension Preservation fund but it is impossible to contact them. The number on the letter, *** doesn't exist. I called about 10 time on +***0 and ***and followed the section for the unclaimed benefit. You get to a point where you need to enter the ID number but the system is unable to register the number entered correctly and then just cut off the call. There is no option to talk to an agent and I can not see how it will ever be possible to claim this benefit if you are unable to contact Alexander Forbes....