Pension withdrawal benefit nightmare

Service from these guys is very poor my ex employer send a withdrawal request of my pension on the 18 of October 2021 but when I call in they say its not showing on their side...I sent them a proof of the actual mail but no response on their side..no one called me back no one is replying their mails etc I spend hours on the line with their agent no help still..I'm very frustrated at this point and I need my money for my obligations..I will never invest anything or associate myself or let any of my family members or friends make the mistake of associating themselves with San lam in future.