NO SERVICE WHAT SO EVER - GEPF

It's now almost 3 months that I have emailed, phoned, trying any and all email addresses of people who was in contact with me regarding my mothers funeral claim in December 2020 but now...nothing. All i get is an "automatic" reply that they need my mothers ID number, where i attach her ID just to received the same ****** email 2 weeks later asking for it again!!!! What does one have to do to get somebody to actually contact me or even reply on an actually email on what the hell is going on!!!!!! Every time i phone...i hold on for 20 min then the phone just cuts off.