Credit card semi functional

After more than a month, I still can't use my credit card for online purchases. This is severely limiting. Absa insisted the problem was on my end for a long time, and after I kept proving it wasn't, they sent an email saying that yes the new cards are faulty, they'll let me know when it's fixed. No time frame given. I highly doubt it's being attended to anyways. I have emailed Marvellus (agent) twice and gotten no reply. This is honestly second rate service.