Account dispute

I went to update my banking details last year between Oct n November 2020 in longbeach mall Kommetjie. In Jan 2021 I received messages that I was behind my account. When I called I was told that they were still debiting money from my Fnb account instead of Capitec. I was told that it's been sorted so I just need to make manual payment off which I did in simonstown post office on the 14th January. And now I received a messages again that my line has been suspended due to non payments. When I called on the 24th Feb I was told that they were still using my old account and a non payment of R202 has also been added into my account. I've been trying to get some solution about this and just been told to go back to the store in Cape Town whereas I'm in Margate.

This is utter ******* to someone whose been a client for years. Their call centre keeps dropping my calls