credit check declines continue

So, reading about many others on this forum and elsewhere, I too got declined due to failing a credit check. I have had mobile phones since 1990 and have never ever failed a credit check anywhere before in my life and im 55. I’m a professional pilot earning over 80k per year and own my own home. My credit rating is excellent. I have recently purchased cars valued over 85k with finance with zero issues. So, today I was declined a £17 a month sim only deal. Is there something mysterious or more suspicious going on here. Something isnt adding up with ID Mobile. I realise the staff can’t tell you why you’re refused unless the refusal is being done by members of staff and not a true credit check. Ive never read of so many credit failures with a company in my life. Because the whole ID Mobile is connected to car phone warehouse, dixons, curry’s etc, I know I won’t be embarrassing myself buying anything from their stores (curry’s) again. I’d fail the credit check so no thanks. I am going to start a facebook group for all of those who fail an ID Mobile credit check.