Account suspended

I registered an account and arranged payment via my Nedbank card since the beginning of E-toll. I had no problems, till the beginning of this year. Some payments were rejected. Recently no more payments is taken from my account and Sanral System says that my card is \hot-listed". I also got a message that my account is now suspended.<br> <br> The card for which payments has been rejected has NO PROBLEM and I use it to transact on a regular basis. I find this surprising and very inconvenient."""