No Tax Invoice!!

I rented a car via Travelstart (booking reference ZA***) for business purposes. Upon requesting a tax invoice for the rental, Travelstart sent me to Cartrawler. Cartrawler in turn referred me to Europcar, who were not able/willing to issue the tax invoice. I contacted both Travelstart and Cartrawler again, but to date no one is taking responsibility for this! I can not claim the money back from you company without a tax invoice.<br> <br> I am left severely disappointed in this service. Surely, a tax invoice is a fairly standard request. I can not believe that I had to spend my time chasing after this, when it is Travelstart's responsibility. I insist on being sent a tax invoice. If this is impossible, please refund me accordingly.