Poor customer service and long delivery time

I placed an order and paid on 18 August and on 31 August was finally notified that my order was out on delivery. I changed the delivery address on 18 August and received email and sms confirmation that it was successfully amended. I received a call from courier but he had incorrect delivery address. I called to try and find out when delivery would be made and was told that the matter would take up to 7 days to be resolved. In this day and age do deliveries really take over 2 weeks, and then an extra week when there's an issue with the courier? This is unacceptable customer service, I won't be ordering again