Discovery bank don't value they customers

So discovery bank decided to put my account on hold because according to them Capitec Bank called them to put my account on hold because of a payment I sent from my discovery bank to my Capitec Bank account because I haven't received my card yet so I make use of my Capitec Bank account so Capitec Bank called discovery bank to put my account on hold because Capitec took the money I sent from discovery bank to my Capitec account for a SET OF to pay a negative balance on one of my fixed accounts so when I asked Capitec Bank about the money they took and what a SET OF is they decided to call discovery bank to put my account on hold because the same money i query about which they took to pay the negative balance come from my discovery bank account so now discovery bank treats me like a ******** I'm being under investigation