Budget Car Rental

Total hell. Excruciating experience with UK Budget customer service.
If you do not want to be charged for tickets incurred by customers renting the same car after you returned it, avoid this place at all costs. Their systems are deficient and they route new tickets incurred by customers who rented the same car after you to your name and address. Budget is taking no responsibility or action to fix this.
Details:
We rented a car for 3 weeks to work in London. We had never rented a car in the UK before. Nobody tells us at the rental location that there is a congestion charge (foreign residents pleas know that each time you get passed a sign with a big C in London you are entering a paying zone and needs to pay online in advance). Our Airbnb hosts after seeing us going in London 3 days in a row asked us if we paid the congestion charge. We did not. We tried to call Budget Heathrow at the number listed on our rental agreement, it is a premium number, which means that you pay for the phone call to budget. We never got through and incurred 20 pounds of phone charges. We call the national budget UK customer service number and are told by a very rude employee that «You should know about it, iIt was all over the news 10 years ago» and there is nothing they can do about it, we have to deal with the London Transport authority directly.
Please know that at this time we just wanted to know how to pay our past charges and how to pay moving forward as our Airbnb host told us that each day that passes without paying the incurred congestion charge makes it go up dramatically. We never got this information from national customer service. We decided to reach out to whatever Budget location we could find on google that did not have a premium number. We found an amazing guy (we wish we would remember the location) outside of London who told us Budget Heathrow is impossible to get through (yet they make the customer pay for a premium number) and he helped us tremendously, giving us simple info to a website and phone numbers for the Transport for london. We were able to settle our past bill and pay for all of our next trips to London.
Unfortunately the story does not end here.
We just got in the mail in the US a ticket from Transport for London that was incurred… after we had returned the car by a different customer 11 days after we were back to the US. We notified Budget immediately calling their international customer service only to be rebuffed by a rude employee (note that international and uk customer service do not seem to have managers or supervisors to talk to so you are left with the rude employee who is there only to rebuff and not care for your issue, I would call this customer rebuffing, not customer service). We emailed Budget about this and they do not care, answering we need to solve this with Transport for london directly. We emailed
(Transport for London) attaching our rental agreement showing that we do not own the car and did not have it at the date of the ticket but they do not care as they see somehow the car registered under our name??? It’s an absurd loop and Budget, by refusing to deal with this — clearly their systems are failing and do not reflect the fact that the car is not under our name anymore, is acting like a criminal. We spent hours and many dollars trying to solve an issue that is not ours and happened during the time the car was rented by someone else.
If you do not want to end up in a nightmare situation ending up dealing weeks after you returned the car with other customers tickets sent to your name and address, AVOID BUDGET HEATHROW AT ALL COSTS.