Discovery bank it's failing customers

Discovery bank has placed my account on pause this month on May for a matter they said it has reported on January and which I'm not aware and they say it's because of R30 that was reported and now I don't remember anything because they took long to pause it.. so now I ask, is this my problem? How can remember things that happened in January because the way I see anyone might have sent this money and reported it and I won't remember anything if they didn't contacted me then.. I tried to contacted them from last week and still my matter haven't been reviewed.. I'm so disappointed with discovery bank because I was expecting to move my salary with them.