Unhappy with discovery bank

An absolute disgrace !!!! I have been banking with FNB for over 20 years, I have had a discovery credit card with FNB for many years. Discovery and FNB have parted ways (May 2020) Discovery bank now handle my credit card, without my approval. I have been trying to get my discovery card up and running. I am trying to download the discovery app, It keeps declining as it says my ID number does not match my credit card.!!!! I have been told weekly since month May that a tech will phone me snd correct the mistake I have been in discussions with 5 different people at the call center over the last 6 weeks Being told to email documents and promises that someone will phone me to correct the mistake I am still waiting????????? I can’t get access to my funds, I cannot do transfers ???????!!!!!!!!! Help Desperate and frustrated Don’t bank with discovery!!!!