Two years ago - 2 - I rented a car in London from SixtUK at Heathrow Airport. I drove said car for a few days before finding it with a flat tyre, over 100 miles from my conference location. I contacted the company for the needed repair and waited in a local cafe for several hours, going back and forth on my cell, before they finally dispatched a service to fix the flat. Only they needed to tow the car to a shop instead of fixing it where I was - mind you, I was in a Salisbury parking lot, not the middle of the moor, so this should not have been difficult, but...the tow truck arrived, the young man informed me he didn't have the right tyre at his shop, so he'd order the right one. This very special tyre might come in within 24 hours, maybe longer. Since I was on my way to a conference, I asked for a different car, given their inability to provide tyres. For cars. That they rent. And they said they would have to bring one from London. So, I had to buy a rail ticket, schlump my bags to the station, and stand in a full carriage for the long trip to the conference, then do the same again to leave the conference several days later. Naturally, SixtUK charged me for the flat tyre. Several phone calls later, they appeared to accept that my additional expense and wasted time were fair trades for their lack of customer service and professionalism. Case closed. But no! Two years later, Inshaal Khan, SixtUK's persistent claims agent, reappeared! (Perhaps they were bored during the pandemic?) The email and phone harassment began. And it went like this: Inshaal sends a form letter; I respond. Inshaal sends another form letter, ignoring my previous email; I write a response that he also ignores. Then SixtUK decided to call, leaving messages to return their call. I responded with email and text, asking them to set up a time to call me since I don't sit expectantly by my phone and don't need to incur international phone charges by buying a new phone plan. No response. Until I get the threatening letter from a law firm in Germany! It seems SixtUK uses the somewhat questionable services of Haas & Kollegen Rechtsanwaltsgesellschaft to harass me now. (Their website is a payment service, so...) Not surprisingly, it took some time to contact them but they agreed to look into the matter. At the same time, SixtUK responded on Twitter, saying they were horrified by this whole story (aghast, I tell you!) and would look into it. They then responded with "We are unfortunately not able to access any information as this has been pass to the debt collector. May we request you to get in touch with them?" I pointed out this made no sense, to which they responded, "Based on the rental agreement you provided, we are unable to identify that this rental was passed to a debt collector. Please send us a screen shot of the letter" You do notice the outright lie here, I'm sure. But I did send an email, with yet another explanation, to which Dawn Lynch-Gibbons responds with the same rote letter I've received before, addressing NONE of the points I've noted in my communication. And now I've received yet another bill from the law firm - sorry, debt collector. This company reneged on a verbal contract - which, if not an actual breach of the law, is a breach of ethics - after execrable service. Sixt refuses to acknowledge my communications, refuses to admit fault in their response to this situation, and continues to require excessive amounts of my time and energy in response to these claims, assumedly toward my capitulating to what constitutes harassment in order to pay monies that were long ago deemed unnecessary. Disgusting doesn't begin to describe them.