Frustrated by Edgars and RCS

Good day, am frustrated with the service received from the Edgars RCS customer service this morning. I called to enquire on my edgars statements because I have not been receiving from June 2020, the last statement I got was in May 2020. I have been paying the account but realise the balance is not reducing much and therefor wanted to get statements that I have not been receiving to do my reconciliation. To my surprise they could not help me because my personal details am giving does not agree with what they have on the system. confirmed I never changed my details from the last time I received my statement and expect the details to remain as they are, I even offered to forward them all the previous statements to confirm but they instead I need to be authenticated before they update my details but my question is who changed my initial details in the 1st place and they don't seem to be able to answer that. All I need is my statements from June to day so I can reconcile and pay off the account and close it, am enough with the inconvenience. Apparently all the managers/ supervisors were on training and there was no one to help me, how is that possible?