Been calling Mr D call centre for two days with no answer!!!

On 22 September I went into an FNB branch to request a new credit card as mine had expired, the FNB consultant advised me that is no problem, for free he will have a courier service Mr D, deliver it to my work place. I waited and waited for a call from the couriers. Mr D called me on 27 September at 17.09pm whilst I was driving. As I picked up the phone they dropped the call, a few hours later I received an SMS to contact them back on ********** 500 which I have been calling IN VAIN since 17.20 pm on 27 September up until right now September 28 and its almost 1pm. I hold each time for over 40 mins and no one picks up the calls whatsoever. I have called approximately 15 times, each time for over 30 mins. This is unacceptable service. There is no website or facebook page or even a call back option!! I am horrified at the call centre, perhaps there is no one working there. Further to that, why did they only try call me once and never try again? I have used MR D before with a Takealot order and that was also hell, but this time I need my credit card urgently and would like somebody to pick up the phone. I have used so much airtime thus far wasting my time calling the ********** 500 number.