You can't take these things personally. A lot of people feel that being turned down for credit is a slight on their trustworthiness. It's simply a business decision by the company offering credit. If you don't fit their target market, you won't get credit and indeed you can get turned down for credit even though a credit agency might report you as having a better rating than someone who gets accepted.
Think you are right - but it is still annoying though. I will take it on the chin as they say. Lol
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Mark