Bad service

I've app**** for a credit card on the 22 January. I chose delivery method of courier. When I called the call centre on the 6th Feb they said the courier company has tried to make contact with me on a number of occassions but my phone was off. This is untrue as my cellphone has been on the entire week. Noone has tried to contact me. The consultant then confirmed that Nedbank does have my correct mobile number and he is unable to confirm which number the courier company has been calling. I then asked him to changed delivery to the branch in Plumstead. I called this morning to find out if this change has indeed been made, the consultant said that the courier company again tried to call me yesterday, I then lost my temper because NOONE from Nedbank or the courier company called me. She again couldnt confirm what number they are calling and she couldnt even give me the courier company's contact details? She then said she does see on the system that I have changed delivery method to deliver to a branch instead but the email has not been sent to Nedbank card distribution to advise them of this. This is immensely frustrating and Nedbank's SLA of two weeks has long been surpassed.