Shocking service non responsive on credit app

I have been with discovery for about 15 years, I owned a credit card may years ago and then transition to fnb and ebucks. I got tempted with the rewards and app**** for a credit card earlier this year which promised 55 days interest free, after 2 months of in excess of R400 in interest charges and calls to the call centre which proved to be a waste of time I cancelled the card. A few months later I was tempted to try again as I live in area which is close to woolies pick n pay and dischem, 3 months later and many submissions os supporting docs their system glitch has jammed my application at the final hurdle many promises of managers that will call me and many many emails to their credit address I still have zero response from them