I wish I could give no stars. In April 2022, I booked a flight to Ireland with Aer Lingus, who quoted a price for two weeks of car hire with Avis. As I have mobility issues, I was using a wheelchair. I arrived at the Avis desk. I was asked if I wished to take out the fully comprehensive and given a price which I accepted. I was asked to sign the paperwork the rep told me what I was signing for in each box. I was given the keys and drove away. Two weeks later, I returned the car to a facility outside Dublin Airport. The vehicle was checked, and I was told the cost would be taken from my card and the deposit would be unlocked. The following week I saw that my card had been debited, but after the exchange from Euro to pounds, the figure was over £300 more than I was expecting to pay. I rang the Avis Customer helpline to find out why Avis had debited so much from my card. The Customer Service rep organised a copy of my bill to be sent by email, saying he could not see all the charges and needed to contact Dublin Airport. When I examined the bill, I found that the Car Hire price was over £150 more than what was agreed by Aer Lingus and on top of the Fully Comprehensive I had been charged over £180 more for windscreen and break down cover, which was not covered in the Insurance. The rep at the Avis desk in the airport had not explained this. I have since learned that it is a trick where the agents get an extra commission for each sale. For the next month, I received emails from the Customer Service rep after having to chase him constantly. I was told that I had signed for the extra Insurance and they were closing my complaint. No reason was given why the Car Hire figure quoted by Aer Lingus was higher than agreed. I sent yet another email asking the question and informed them that I had a witness who would send a statement regarding what the Agent told me I was signing for and the price he gave me for taking out the Insurance. Their reply was here is a copy of your invoice. I am now commencing a court action to get a refund of what was overcharged. I will never deal with Avis again because of their agent's deviousness and appalling Customer Service.