Disdainful customer treatment

I ordered a product online. After confirming the order they sent me a recommendation to opt for courier delivery service, which I duly paid, and this was acknowledged. They then sent me an email confirming that the order was being processed and that I would receive a tracking number within 7 days. Three weeks later, after a total absence of any communication, I wrote them to voice my disgust with their disgusting service. Suddenly they could confirm receipt less than 24 hours later, offering what can only be described as a pathetic attempt at an excuse. Their lack of customer communication in the event of any problem, their obvious disdain for their customer experience, speaks of a company that has little regard for any future business. Subsequent to my complaint, their communication has improved with very quick turnaround responses. For that I am grateful. However, I am keen to see if they will honour their commitment as made in their recent communication. Though they have good products and offer good prices, I will not utilise their services again, nor will I recommend them to anyone. If they honour this latest slew of emails, I may be persuaded differently, but the jury is out on that.