Following a long flight delay last week, and a flight cancellation on Monday night, I received an unsolicited text message today from FlightClaim.me telling me to start a flight claim as a “recent flight was delayed/cancelled and you may be elegible for compensation.”

What’s bothering me is how they got my data

I booked the flights directly on BA.com using avios
I have a Flighty app subscription where the flights were being tracked (but they don’t have my mobile number)

Am I able to find out how FlightClaim got my data? I know you can request the data a company holds on you, but I don’t know whether you can easily find out how they got it?

It’s the principle which really bothers me more than anything