Uber India — Driver didn't turn up

Address:

New Delhi, Delhi, 110065

We booked a taxi from [protected]. driver jaldeep (car number hr55y2595) picked up the phone and said he would report at friends club, friends colony west, new delhi within 5 minutes. after that we rang up his number [protected] at least 20 times, but every time either the phone was out of reach or was reported as busy. he did not turn up, though we waited for 30 minutes. ultimately we had to cancel the trip, and take ola.
Please let me know why it happened