Poor customer service with dishonesty

I would like to share my horrific experience with this company I served a notice letter on the 4th of May that I'm moving out on the 31st of May and to my surprise my account was debited rent money on the 20th when I had instructed them I went to the branch to try and reverse the debit order FNB then advised due to lockdown they don't reverse debit orders so I must contact my service provider to refund me I then called the manager Lena Maseko who **** and told there was no notice served under my name meaning the building had not sent anything the same Lena Maseko then sent an email saying I must provide confirmation letter that my bank said they can't reverse debit orders before they can refund me it is not my problem that they incorrectly debited my account but they are being rude to me and expect me to go back to the branch and waste my time where as it's their mistake this company doesn't know how to deal with customers at all