Shocking Debit order system

My Discovery card is paid by debit order. during the month when my card is exhausted - I transfer money into the card account in order to continue using the card. My debit order was supposed to go through around the 3rd of the month and now my wife and I are getting declined everywhere due to insufficient funds. Discovery now tells me that if I put money into the card account then the debit order gets cancelled. I said that is bull dust as I expect them to debit monthly for the full payment irrespective if I put money into the account, further more I was not asked if I would like my debit order to be cancelled if I do deposits. WHO SAID THAT I AM DEPOSITING TO PAY MY ACCOUNT??? I am depositing to use the funds. This is extremely frustrating for such a supposedly leading company to operate. I am an extremely busy individual and need professional systems from my service providers. If I pay my account manually now - it will take approx. 4 to 5 days to get card operational. People don't waste time with Discovery card - STICK TO NORMAL BANKS THAT WE ALL GREW UP KNOWING - MUCH SAFER AND LESS WASTE OF TIME AND EMBARRASMENT. OH I FORGOT TO MENSION THAT I HAVE THEIR SO CALLED PLATINUM CARD.