incorrect pins and invalid MacDonald vouchers

I am soo fed up with ABSA MEGA U benefits department, since last week i've been trying to get my child's monthly benefits but they keep sending me invalid pins and voucher. Someone sort this mess up or if Absa can't handle these benefits they must just let me know instead of playing with my time like this. Deliver what you promised if you can't deliver just cancel the damn things. Or hire staff that can do their jobs and not escalate a matter for two weeks and not give feed back at all. This is about principle, you promise you customer something..you deliver on your promise. Someone send me vouchers that are actually valid please, am tired of looking like an idiot at McDonalds with your invalid vouchers that decline all the time. I expect better service from ABSA than this **** service they're dishing out.