Unable to get statements

I have been asking them to send me a statement of my account because it clearly shows I have two accounts with them on my Clearacore report. Last year during covid I missed some payments but was never given any statement of accounts to see how much in arrears I am . However when I app**** for a bond, they claim that I have two outstanding balances with BLC, one of which is R2700 and the other R2300 , my initial product was R4000 that I purchased and made regular payments on the account until I was unable to pay due to unemployment during covid.. When I called for a settlement amount, I was told it's R6300, but they cannot provide me any proof of this. Some of the payments I made also does not reflect on my account and that' is why I asked them for a statement but they insist I should get a Bank statement from my side to prove payment. Also the cellphone I bought, only worked for a few months before the hardware crashed.