Maxidor - poor turnaround time

Experienced the worst service from Maxidor Sandton together with their headoffice. We paid the deposit which was on the quote on the 22 Jul 2019. The order for gates and burglar bars was placed on 23 July 2019 by sales rep. Based on the interactions with the sales rep he mentioned they potentially turn the order around in a week which seemed attractive. They did manage to install part of the order on the 27 July but arriving almost 2 hrs later than the promised time and also partly installed on 3 Aug again arriving late. The main part of the order based on the head-office promise was supposed to be turned around within their 14 working days policy, i.e. 12 Aug. However i have learned that they actually messed up the order and it will only be made available on 16 Aug with installation hopefully on 17 Aug, which is now 18 working days and even this is not guaranteed. In terms of communication to customer with regard to expectations of lead-time to supply i believe Maxidor have failed dismally. They have no idea how customer service is actually done and a promise made according to their policy on invoice is in breach. I would like to request a refund on remaining work as i believe the company has contractually breached their obligation to deliver its product within it 14 working day turnaround time.