Help for iic Oticon

I would like to ask for help.
I just got an Oticon iic, for hearing loss on the right. I quickly get used to new sounds, but with the audiologist I definitely need additional adjustments. What worries me is the pain in the lower part of the ear canal, which I immediately reported and the aufiologist said that a new impression would be needed. One more thing, when chewing, the brace seems to move and deafness occurs, should it have sat deeper in the ear? Also looking at pictures online, my iic doesn’t have a vent hole?