Lack of communication to customers

In general I have always had a very positive experience with Exclusive Books, and have been a customer for quite a while, however I have recently used their online shop and it has left me a bit concerned.

I ordered two books to be delivered on the 14th of February 2024 and received confirmation that my payment was accepted, however there was not communicated when I would receive my delivery. I then sent an email on the 19th of February as follow up to have an idea when the books would be delivered. I received an automated email with my ticket number. On the 22nd I still haven't heard anything back and then called the customer service number, twice, and was sent to voicemail. It is currently the 24th of February and it seems my ticket has still not been processed and when I called again I was once again directed to voicemail.

While I understand that deliveries take time, this is not what has frustrated me. The books I ordered are books I require for work, and not having any idea when said books will arrive has been a bit of a hindrance, and the fact that there is a lack of communication is making worse.