Lufthansa — Flight cancellation and not giving full reimbursement

I had flight from Los Angeles to Bombay via frankfurtbut on 26 December 2022 flight LH450 to frankfurt and then frankfurt to Bombay after departing from the lax it got diverted and cancelled on chicago due to laptop of some passenger on fire and the Lufthansa ground staff said to book new ticket and they will refund original ticket and reimburse newly booked flight but after coming at my original destination they only refunded original ticket and not any of hotel stay or the newly booked ticket that I booked and I had exams on coming to my original destination so I had to endure mental torturing of the Lufthansa staff on call by them when he asked for the reimbursement of the new flight that I booked at airport so I'm complaining for reimbursement for the new ticket that Lufthansa didn't reimburse and for the mental torturing that their ground staff gave to my son on call by ghosting emails and cutting off call mid talk rudely behaviour on call by them
I booked air India flight from chicago and I'm adding it to the attachment