TRIVAGO HOTEL MANAGER US

I cancelled our subscription from Trivago, but was one day late. We tried to tell them that we have not received a notice or reminder, but the Manager Mark Mc Brien would not listen to any reason and went as far as telling me the Debt Collectors will be put on us. I eventually saw they wont see reason, so we paid. I have asked several times for a Tax Invoice reflecting my payment and showing a nil balance, but instead am told to just go with the correspondence, as they cannot issue the Tax Invoice I require for our Accountants. I have requested and explained several times, but to no avail as yet. They are based overseas and have a Tax id etc on their correspondence??

They were quick to ask for our money (Invoice in Euros), and to not even listen to negotiating and now that all is paid for a vrot service, I cant get a Tax Invoice as required. I have given them notice to not renew again, and also again was told that I should put that on the system closer to the expiry date next year. Why can they not make a note of this now? In fact, I asked for stats to see what we are paying over R4000 for, but they cannot give me any positive feedback. I am ever so sorry we fell for this marketing ad.