Terrible service and extremely late delivery

Below are the issues as they happened:

1. I tried to order an item on their website as they are an online store. The item showed that they do not have stock, but it also does not allow you to order the item because they have no stock. I managed to get them to specially activate the product for 5 minutes so that I could order it, but I feel that this is not going to solve the problem for anyone who would like to order in the future and maybe does not go through the effort I went through to make the order.

2. I was told the item would arrive within 4-6 weeks. I got hold of them and they initially told me I would receive it within the first week or two of December. I had no issue with this as I understood that it needed to be imported. I followed up accordingly and I was told that the shipment had been delayed as they had wanted to add some items to their container coming from overseas. Unfortunately I don't think this is acceptable as I was given a delivery timetable and was now being told that they decided to hold it to add items to their container which is essentially not the clients problem at all.

3. I was told that I would still receive the shipment before the end of the year (2017). I then followed up with them on the 27th of December and received no reply. I followed up again on the 29th of December and again received no reply. I tried both calling as well as emailing.

4. I emailed again on the 3rd of January and finally got a response saying they they unfortunately were on skeleton staff over the holidays and would only really be able to help me again on the 8th of January as my sales person came back to the office.

5. I waited for the 8th and received nothing only to receive an email on the 10th saying that the PolarPro shipment had just arrived with them and they would be sending it shortly.

6. I followed up to find out roughly when I could expect the delivery and was then informed that they had accidentally ordered a similar but incorrect item. They then proceeded to ask me to pay the difference after offering me a slight discount to try and make up for this. I don't think that this is professional or even acceptable as it is not the customers fault that the order was placed incorrectly and completely fumbled the entire length of the order process. And then is still asked to pay in the difference between the two items.

It was at this point that I cancelled my order after battling with them for over 2 months.