Poor Customer service

So my account is nowhere to be found in Capitec, and they say I should write an affidavit explaining everything that has happened, what should I write, because I can't excess my bank app, I can't even request a statement, online banking as well, at the branch they don't have excess as well, they say the computer doesn't show anything 😒 this is so frustrating, I'm so drained, how can a big bank like Capitec be so unprofessional, how can they tell me to lie on affidavit about something I don't know. Capitec bank had technical issues last week, but now they're claiming that my account has a problem, I'm so annoyed and very angry about this, worse, this affidavit thing 😡