Ola Cabs / Ani Technologies — Ola service results in gross overcharge and unethical practices

We hired a cab using Ola app from T2 terminal in Mumbai Airport. It was raining and crowded and the app registered rides 2 times but the ride was cancelled. The 3rd driver accepted. There appears something wrong as the driver had the code but number plate looked different. At destination driver wanted cash as he needed it. Later we find there was also a debit charge in Ola post paid. The amount charged again was 847 rupees. Thus a normal charge which would be around 250 rupees, costed 847 +847 due to high surge charges and cheating by Ola hired driver. CRN [protected]. Wrote to Ola but they replied they cannot do anything.