Inept Service

I rented a vehicle from Avis Kimberley Airport on the 111th October 2019, got a vehicle, signed the documents, took a little 'safety token' in case of emergencies, and was advised to pay for an 'UPFRONT TANK OF FUEL', no more information was given to me regarding this added feature. On returning the vehicle, with a tank of petrol that only had 165 km's driven out of the full tank, I was informed I should have brought it back empty, and NO they cannot and will not reimburse me for the amount left in the tank. I was told someone who was higher up than the management in the office that day would call me back in a day, my complaint was that I was NOT INFORMED to bring the vehicle back empty, otherwise I would most certainly not have filled up in Bloemfonteing, 155 km's from Kimberley on my return trip. They have yet to call me! The R50 I spent to fix a puncture whilst the car was in my care, also not reimbursed. I have no idea when I'm supposed to get the difference back of the deposit I paid upfront either, I was told 5-10 working days, that was 4 weeks ago. I also spent R120 to have the care cleaned back to the condition I received it in, this I understand is not for reimbur*****t, but I would prefer to return a vehicle in the state it was the day I took it. The service upon returning the vehicle was so bad, it made me feel like, we've got your money and too bad for you, type of deal. Really left with such a bad taste in my mouth, I will walk a thousand k's before I will ever rent a vehicle from this pathetic, money grabbing, inept company. If their staff don't inform their customers exactly what's expected, my feeling is they should reimburse the money I lost on the nearly full tank of 93 grade petrol!!!