Poor pep customer care service

I went to Pep to purchase two stylo tablets. The lady at the till put everything through and when sending the OTP it did not go through to my phone. I told her that I forgot that I am using a new nr as my old nr was hacked When phoning pep customer care I had to give my ID nr, which I did. That it self should have been proof enough and giving my birth names and surname as well. Then she said she will ask me a few questions for security reasons. I answered the first 2 correctly and the she asked me when did I last buy on my account , I said I am not sure but I think it's been months and that if I remember correctly it should be about 3 to 4 months ago She said she needed the exact time and date. I couldn't give her the correct time according to her. I the went back home to fetch my old tablet to see if the OTP code came through, and it did. I then went back to pep and we tried again, this time only to find out that the agent on the phone blocked my pep account card without informing me or without my permission. Now they want a copy of my ID and 3 months bank statements from me to proof that I am who I said I am so to unblock my account.

First of all, why must I give 3 months bank statements when it's got nothing to do with them?

And Second, They should have been able to see that I am not a ***** and that I am who I said I am

And third proof, I bought a cellphone from them and the week after I settled that outstanding amount.

The lady had no right to block my account and she has no right to my personal bank account

Please advise

Kind regards Mrs AE Engelbrecht