Unable to pay - ***********!

I have made payment into my discovery card this month. Yet again a hassle to make payment!! Does discovery not want my money?????? I cannot add this card as beneficiery with the 10 digit card number. It gets kicked off the fnb website. I can pay with the discovery card number. This payment was recognised last month but this month it says no payment. CAN SOMEONE JUST LINK THE 2!!!!!!!!!!!!!! useless bank, just creating stress for someone that actually wants to pay their account