The executive summary: nasty tourist trap to avoid like the plague

I have lived in London my whole life and I go out to eat regularly; Salvador and Amanda is probably the worst dining experience I have had.
We were seated at 8.15pm and by 10pm we still hadn't been brought our food. We were forced to go with the set menu because we were a group of over ten, and that was the classic group rip-off that tapas dives do: not bringing anything like enough food for what we were paying. We had about four patatas bravas each, one piece of chorizo, two mini bell peppers, etc. All for an extortionate £18.50/head!
We complained to the manager, who, rather than apologise for the fact that two hours into the meal everyone was angry and hungry, started disputing how long we had actually been waiting. It was Fawlty Towers without the humour. He then lied and said that he'd bring some calamares on the house; which then appeared on our bill!
To top off this awful experience, naff techno is blaring out over the speakers to create the “fiesta” atmosphere.
Utterly, utterly horrendous.