No feedback regarding debit order

I changed my banking details in September, for my debit order for my monthly premiums to go off. In October, my debit order did not go off. I phoned Discovery and had everything sorted out, after being told I had missed a premium (which I did NOT, it was a mistake on Discovery's side). <br> This month, my debit order again did not go through.<br> I phoned Discovery again, only to be told that they don't know why it didn't go off and that they would give me feedback as to when it will be rectified.<br> I did not receive feedback and sent an email.<br> A consultant called me, and told me the reason the debit order didn't go off was because I was a month in arrears, which can't be possible (again as dealt with in October). <br> I told him I couldn't stay on the phone since I was at work and requested that our correspondence via email continue, since my workplace prohibits cellphone use.<br> I received no feedback.<br> I sent another email, but still have not received any feedback, and my debit order still hasn't gone off.<br> <br> This is utterly pathetic, since Discovery has no problem suspending my medical aid service.