I booked flights and car hire through a travel firm as a package - the car hire being with Greenmotion. I was concerned over the arrival of my flight and not being at the rental desk in time before their closure at Manchester Airport so I rang Greenmotion, twice, the day before my arrival but could not get past the recorded messages to speak to anybody, with no option to hold. I then emailed them but got no response. Having done the pre-check in with them so they had all my contact details, I stupidly assumed that they would contact me if there was a problem. Needless to say, the rental desk was shut by the time I got to them so I was left stranded at the airport without a car rental for the duration of my trip. I have since tried to get a refund from Greenmotion but they refused via the travel company, stating the Terms and Conditions of needing to contact them if a late arrival (!). I also emailed them directly but have never received a response so they need to take a long look at their customer service and communication as in this day and age, there is no excuse. I would advise you to look elsewhere.