Online order cancelled with no reason - Call centre offer no help

Pick n Pay Online and Call Centre: Made an online order for over R6000 (more than 100 items) to be delivered and the order was just cancelled and no reason or response was provided. (Not pnp ASAP). I contacted the call centre and they said it was cancelled by the branch (Mulbarton in Jhb). The call centre said they would let me know why it was cancelled. After 4 calls to call centre and even the call centre senior manager promising me a call back, i still don't know why they cancelled my online order and i have never been called back from their call centre. I called the Mulbarton branch many times and they just end the call so there is no contacting them. This is not the ASAP small orders, this is the online orders. The problem is that i dont choose the branch, their system does that based on my location. My orders are set to substitute so its not like its a stock issue and i make these orders every 3 weeks for the last 11 years. You might say just use Checkers; the problem is Checkers only allow 35 items which is a nuisance as my orders are over 100 items and Makro dont do fresh produce online. Its a pity Pick n Pay dont seem to care about me as a customer. My usual order is over R10k per order but i cannot sit and add items to a cart for 45 minutes only to be cancelled again with no reason or regard for the customer. And why is the call centre so powerless is resolving the issue - oh maybe because they say its a franchise blah blah. Where else can someone order bulk online including fresh produce for more than 100 items?