Capitec closed my account because I received R500 bonus

Capitec close my account without informing me on the 25 April 2023, I went to the bank the following day to ask them why my account was closed they said I must make an affidavit which I did n submitted, I checked with them again on 02 April 2023 they said my affidavit it's not details I went n do another affidavit with details where I got the money who sent it to me and why did I receive the money in question (R500) I submitted the affidavit late yesterday I got an sms from capitec saying they won't open my account they don't give me their reason after I submitted everything they want, I just want the money in my account and I will stop using their bank.