Great service quickly turned sour

So a great customer service experience quickly went sour in that i was approved for 10k over the phone, sent an sms that i should phone to accept the offer. So imagine my surprise when i phone and the offer is now only 2500. I have described that we need to have our car fixed which is why we needed 10k. I feel that this is very unfair, considering i have had a Makro store card previously on which i never missed a payment and also paid off early. I also app**** for a new card a month ago that was approved with no issues. So why cant i get the offer i was approved for?