Uber India — gift card balance not being shown correctly

Address:

Indore, Madhya Pradesh, 452014

I have added uber gift cards worth rs 2600 and have used around 800.
Where is the remaining amount?
Have contacted the customer care around 10 times but they are not responding and are not understanding my problem.
There is no proper support phone number where we can call and make them aware of what crime they are doing and nobody will trust uber if they eat our hard earned money like this