Does the GEPF need more employees to answer the telephones?

I have been calling their callcentre for the last week. I have been kept on hold for more than an hour at a time. I haven't spoken to any agent. All I want is my latest payslip as I am a pensioner. I tried the selfservice app, but I also cannot come in. This. Is the worst service ever. I have sent emails, but to no prevail. Nobody answers me. What am I to do??