Lost in the Translation English Spanish

First Try:
I once was dating this Argentinian girl for about 6 months in London, England. We were talking in a bar and I said "I was with my ex girlfriend here last week". As in I saw her in the bar but didn't speak with, obviously because she was my ex. The Argentinian promptly stood up and stormed off. I tried to explain but communication was only going in one direction. She never responded to any of my calls and I never spoke to her again.

Second Try:
I was with a Spanish girl in Deñia, Spain we had been dating for about 2 years. At this stage I could speak Spanish. She was complaining that I never speak English to her so I said "If you are tired you can go to the  hotel and we can meet up at 23:00 here", this was at 17:00, and I had no idea where the hotel was as she booked it. So we get to about 11:45 and still she hasn't arrived so at 24:00 I gave her a call, cell phones off. I try calling several times during the night, but don't get through till the next morning.

In the morning she is mad as hell and says in Spanish that I never came back to here that night, accusing me of sleeping somewhere else, possibly with a girl. She obviously had not understood that we should have met up at 23:00 the previous night. The relationship ended on that note.