Discovery purple credit card locked without a.phonecall.

Discovery has without notice, at least a phone call, locked my wife's credit card. This is the second time that they have done this. They are extremely unprofessional in doing this as ones credit card is used several times a day. If the account is not paid then yes no problem but a perfectly run account - not acceptable. Furthermore it is a purple card where we are.supposed to have private bankers assisting us. The monthly fees are extremely high but we pay expecting a seamless operation and personalised service. I am shocked & disgusted as to how discovery would lock a purple credit card without calling the client to avoid such an inconvenience & embarrassment.