Retrenchment letter

I was retrench in August 2020, and since then I have been trying to communicate with absa via email and telephone. On the 2th of September I have sent my retrenchment letter via email and no response since then again on the 14 September I resent email and call absa same day and I was told that they where documents missing and I must resend again of which I did same day and call again, agent Tebogo told me it will take months before they can be able to assist me. On the 18 of September I have resend same document again and no response, again on the 21 September I send documents again and called absa to check if they received my documents and the lady Monique Frederick's told me that she can't see my documents and I must send again through her personal email, of which I did and no response even now. I have used my data, my airtime and no one is willing to help me. What must I do now, I don't work anymore but absa is calling me almost every to request payment and I repeat same thing I have send my retrenchment letter but still...... Please assist