Bad customer service

I have never been treated as shabbily by a business as I have been treated by Shell SA. A petrol forgot to replace my fuel cap at Shell Ultra City Klerksdorp. I had to drive from Klerksdorp to Cape Town without a fuel cap. To add insult to injury Shell is refusing to cooperate with me in ensuring that my fuel cap is delivered to me even though they confirmed that it was left behind at their petrol station. My calls and e-mails are totally ignored. Shell treats its customer badly. I'd rather be stranded next to the road than fill up at a Shell station again. Bad customer service!