Discovery Bank shocking performance

I have a 24 mth fixed deposit account opened on 2/11/2020 for which I received interest on 30/11, 31/12, 31,01. I opened a 12 mth fixed deposit account on 5/01/2021. No interest was reflected on 31/01/2021. Despite phoning twice for an explanation, I have received none. This is a shocking performance by a new so-called "digital" bank.