Timing is everything

I placed an order with Geewiz at the end of August, and by the end of September, it still hadn't been fulfilled. Only after I reached out for an update was I informed that one of the products had an incorrect price at the time of purchase and would not be supp**** unless I paid the difference. How is it acceptable that more than a month passed without any communication, and I only learned of the issue because I followed up? While they claim to take full responsibility for the mistake, their actions suggest otherwise. There was no offer of compromise for the pricing error, the lack of communication, or the delay on the rest of the order. Their oversight has become my problem. No customer should have to wait over a month, only to be told they won't be receiving the item they originally ordered.