Indian Railways — Allotment of Middle birth for Senior citizens

Address:

Airforce station Sarsawa, Saharanpur

Sir,
I have booked 04 ticket through irctc from Buxar to Saharanpur by 03255 Ppta Cdg Spl express on 19th Jun 2021. Pnr. No.[protected] date of journey 30th Jun 2021.

Although i choose two lower berths for senior citizen preference option but surprisingly the system allotted me all four birth alternative no seats with upper berths& middle birth.
Now i am in very much tension how my 82 years old father and 63 years old mother will avail the middle berth who has acute knee problem & Hypotension with obesity
Will you please re-allot at least two lower berth for my Father and mother.
Regards
Pramod Kumar Rai
Pnr. No.[protected]