Very disappointed after booking 1AC tickets for me and my wife

We bought 1st AC tickets under same pnr of us (newly married couples) from Shalimar to Visakhapatnam in coromandel express. We opted for a coupe but to our surprise we got cabins that also seperate and even worse the cabin my wife was alloted was filled with 3 other dudes. Absolute rubbish. I sincerely hope some changes to be done so someone else doesn't face this