Terrible systems and customer service

I have not been with Diners club long, probably around 2 years and I used to love my card, but since I got my new card it I no longer feel the same, as the new card requires a pin an I am unable to choose my own pin, the call center agent tells me to phone every time I am at the till to get my pin or write it down and carry it with me, I honestly cant understand why Diners club cant use Standard bank's systems to allow customers to do this as this is what Amex and Nedbank does, which by the way gives better rewards. I have been td since last year Diners club is working on a system that will allow changing of pins but it is still not implemented, I think it is unacceptable that Diners club does not realise this need from customers, I will be canceling my card if not implemented soon as I have no need for a card that I havr no Idea what the pin is