Poor service

I have been trying to claim my pension fund since I left my former employer in August 2023. I have been told I did not submit a withdrawal form, which was subsequently sent to me and sent back. Whenever I call to find out the status of my claim, I am constantly told I did not indicate a withdrawal. I reported to the complaints department who promised feedback in 4 business days with no response. I have been assisted by numerous employees who promise to call back with feedback. Not a single one provides feedback.