My Nedbank greenbacks being ******

It seems someone at Nedbank is *****ing my greenbacks and enriching themselves. I have a nedbanks greenbacks shop card and i could go and withdraw my greenbacks as cash and everything was wonderful. Then out of a sudden my card stop working. Despite various attempts i was not helped. When i initially made enquiries i was told my card needed to be relinked. It was relinked but still did not work. I was then asked to apply for a new card which i did. still my new card doesnt work. It seems someone is *****ing my greenback points and converting them to cash. I also previously could login to the greenback website and make purchases. Now when i login to the greenbacks website i constantly get the same error for the past 12 month. The error message is below:

Unable to Process Request We were unable to process your request. Please try again. If you continue to receive this message, contact our customer service department by clicking here. We apologize for the inconvenience.

Event ID:No_Account_Found

Someone at Nedbank is obviously playing tricks with my account and thats not right