Dunns approved account gets declined without notification

I am so confused. I firstly app**** for a Dunns account onlineI, i got a message saying my account was approved and was told i can collect a card from a store, like an idiot i went to a Dunns store, (the person assisting me was also not really friendly or welcoming),that is quite a distance from where I live to collect a card as instructed by yourselves to do so.

When i got there i was then told that my approved application was now a declined application.....

Please could you kindly advise me on what i can do to re-apply as the online option isn't working now.

Very disappointed abd annoyed.