Taking money while not delivering or responding

I wish I had read the HelloPeter reviews before placing my order with Exclusive Books. Paid for 5 books upfront, and was told to expect delivery 30 days later (31 January 2023). I got an email from a Customer Service agent (Bronicia) mid-January, saying one of the books was damaged and asking if I wanted to take the book plus a R30 voucher or if I wanted a replacement of the book which would take another 30-40 days. I chose to take the damaged book and voucher. I then followed up on the delivery and voucher on 1 February, and received no response to my emails to ***, but was told by Bronicia that the books were on their way. I followed up again about the voucher, receiving no response. I received 4 of the 5 the books today (3 February), but the damaged one was left off the delivery invoice and did not arrive. I tried calling the landline number on the delivery package 5 times but they line would just drop after ringing a while, and I tried calling the Customer Service number multiple times (more than 5 times), with no answer. Bronicia also hasn't gotten back to me about the missing book or voucher. The Exclusive Books email address yields no responses. And no one is responding to my questions on the online chat function. I already paid and they are just ignoring my attempts to contact them and I don't think I'll ever receive that last book. This is theft.