Ola Cabs / Ani Technologies — cancellation of booking without my knowledge within less than 1 minute of booking to accommodate someone else.

I came to mumbai from bengaluru by jet airways at abt 23.45 hrs last night (06.06.2018)
I booked ola cab at at 23.58 n got message that mr. Mohammad was assigned to me.
Accordingly, i went to p7, ola cab pick up point as told by counter girl.
I am 72 years of age and was exhausted going up to your pick up point. When i reached there i called up mr. Mohammad and was shocked to hear when he said that he was assigned to someone else and not me.
In order to recheck, i open my tab and then found message that my booking was cancelled at my request.
My booking message was at 23.58
My supposed cancellation was at 23.59
Since i was unable to read otp i had given my tab to counter girl n she had it till she completed formality.
May i know why the counter girl cancelled my booking?
Since i was already out of airport terminal, i was not allowed to go back inside. I had to therefore go about asking people where i can get taxi. Finally i reached p4 stood in line for nearly 25 mins n take prepaid taxi.
I reached home at 1.20 am.
I believe that my booking was cancelled in order to give it to someone who paid extra.
I demand to know what action you will take for causing me so much of trouble and mental stress.
My name is prutha patel.
Cell no. On which i received messages n otp is[protected]
Destination : thane - west, near teen haath naka.