Urgent help for my CAQ

[Aaamirrr]

Hi, I applied for a college and the admission was on May, so I asked for CAQ and it also issued at May. But as I had to apply for Study permit, I change the starting date of the college to July. I arrived to Canada at Jun and I asked for a new CAQ top change the college. but the MIDI rejected my second CAQ (rejected not refused), although I send them letter of intent and explained everything. Now I want to know that is the first CAQ still valid to continue my studies in the first college (expiration of that is in 2020) or it has been affected by the second one and not valid any more?