Delivery promised then delayed with no further info

I placed an order that was split into two deliveries. On 25 October, I received SMS notifications confirming both would arrive on 26 October. After waiting all day, I was informed at 6:03 p.m. that the delivery would not take place, also receiving an email at 6:01 p.m. stating it had been delayed. The first part of the order was still delivered at 6:40 p.m. that evening. When I contacted their call centre on the 27 October about the second delivery, I received conflicting information. I was eventually told the items are pending collection from a nearby Game store(the items are apparently in stock), which may take 2–5 days to deliver. Was the delay due to delivery scheduling or a stock issue, as the store has the items available? No further updates have been received from Game.