Suspected ***** on refueling

Good day<br> -I returned my rental car on 15 May. I filled up VW Polo (1.4l) at 1543pm and returned vehicle at meeting point at 1545. I offered my refuelling slip to man who told me that it was not needed as vehicle would be refuelled. I then received a bill of R172. This is physically impossible on a vehicle that was refuelled 2 min earlier. A full car (especially with a tiny engine) will NEVER require such a large refuel. I expected a bill of R20/R30 as they may try top up to very last drop -but R172 is a physical impossibility in a car this size. I immediately complained REF 443481- and was told branch manager would contact me - he never has. I then called call centre twice more and requested follow up - last spoke to Theodor who refused a reference and said I should use his name. Once more - they committed branch manager would call. I suspect there is ***** on refuelling and staff / persons are overcharging clients. I will never EVER use Europcar again . This is THEFT and the customer service I received is appalling! This was cherry on top from a poor experience from moment car was received.