Bad service selective amnesia

They have generally been quite good, however in December 2020, I arranged a collection which had to go to four different destinations around South Africa. There were 120x cartons in total. Despite me emailing and arranging the collection, in good time and confirming with their Durban rep, that all was in order and checking three times on the day (Friday) of the collection, they finally arrived after 5.30pm (We close at 4.30pm)(We worked night shift for two weeks, to complete this job!). This info was passed onto them! The driver then told us that his truck wasn't big enough to take the cartons! After a number of phone calls to Kargo, to speak firstly to the rep, who was offline and then finally the Operations Manager, I had to accept that they would only collect on the following Monday. I also clearly made it known to the Ops Manager that the goods could not be delivered late because they were for a promotion. He indicated that the delivery would be done at no charge, which he now has selective amnesia about. The upshot of the debacle was that two of the deliveries were late and I lost the customer!!! I have tried since December, to talk to the rep because I refused to pay for delivery, except for a credit they decided to give me about a month ago, of R 300, which has now resulted in them handing me over. Never will I deal with them again!