Never use them again!

Having been a loyal client of what uses to be a reliable and prestigious car-hire company, I am bitterly disappointed in the staff conduct and lack of professionalism. The car I was given at East London Airport, South Africa, was not the upgrade which I had been promised - with the excuse - we don't have. I had sent an email 5 days prior to my arrival plus a WhatsApp to remind them of their upgrade offer. Not only that, the car had half a tank of petrol, and was not 100% full as stated in the online report. When driving, I reported this to their online customer service, with the response "Call them" - referring to the East London branch. I then instructed them that they should be doing the calling! When I arrived at my destination, I called and was told to email a certain *** about my issues. I gave her 24 hours to respond and still nothing! Shocking, shocking service. They don't care. They don't want to care. Never again