Dont use First Car Rental

Upon arrival at the car rental in Namibia, the assistant did the check of hte bakkie (pic-up) with me. I noticed the back wheels were totally worn down while hte front tyres were new. I complaiend adn said I need a replacement to which she said there were no other bakkies. On route I had a flat ont eh back tyre which was totally destroyed and lost 3 hours thus missing two meetings and inconveniencing a number of people. I drove mostly on tar and sand so the tyres were shredded by wear and tear. THen they overcahrged me for the car forgettign tot take off the deposit. ANd no word of apology when I complained when I returned the car. IN fact they told me I needed to replace the tyre, which i refused to do. I think the billed me for the tyre replacement as I cant understnad why the cost was so high.