Date:4/27/2019 Ref #:[protected] Escalation Ticket # [protected]?? Made reservations online for a car and paid for the car rental online. I arrive at the airport and had a discussion with the representative about whether or not I wanted to gas up the car before returning to the airport or and I opted to have the airport gas up the car for a fee of $8 a day. I sign at the counter and was given the rental agreement and was told to go to the ground floor for keys and car. I received the car keys and was told car was in slot 28 and left the airport. Now prior to getting to the car, no one mentioned that this car was upgraded to a luxury car. Returned the car on the day scheduled and was given the receipt and reviewed the charges that no indications listed in regards to upgrades. I got on the plane & returned home. A Few days later, I happen to be looking over my account and discover that my credit card has additional charges... I call Avis and was advised the charge was for a gas charge and a upgrade for a luxury car. No information in regards to a rental upgrade was ever discussed with me when I picked up the car. I do not like the fact that my options to make the decision for an upgrade was taken from me. A change from the original agreement is something that I feel should be discussed with the individual that is picking up the car. Then I call customer service to dispute the charges and barely can get assistance for the issue. This whole experience was the worst car rental experience I have ever endured. In addition to that, I asked the representative for a name and number or email to escalate this issue so that this situation does not persist and was continuously told that there was no contact number or email that could be given. Then after speaking with this same representative for almost an hour he places me on hold and comes back with an escalation email that I can send disputes on which was [protected]@avisbudget.com. I go home and look this up and this was not accurate information given for disputes. Where does this ever happen??? The whole process of the call and entire experience was unsatisfying and irritating. It was like pulling teeth to try to get information on how to go about escalating my concerns and for that it would be very difficult to get business from me again.