Terrible, Unprofessional Service from Nedbank Credit Card division and Complaints department

Summarised: After receiving a call to increase the limit on my Nedbank credit card, and responding in kind to do so in early February, I have been disappointed several times over in getting this done. Several calls to the agent who handled the application has failed with NO contact made to assist or even feedback on progress. The Web and Mobile applications don't work. Calls and discussions with the complaints division has also failed with NO feedback from Dorothy Snyman either. I am fed up and at wits end on where to go from here .... so if anyone at Nedbank is interested in retaining me or my family members as clients, please reach out to help.