[Resolved]  Tata Docomo — unable to call jio number starting with 6 digit

I am unable to call jio number from my docomo number, it is saying that you are dialling a wrong number,
The number i am calling is [protected].
It is happening from almost 4 months.
Also unable to contact customer care, tried 198, 123, 121 every number that ia mentioned as customer care number,
I have also dropped an email to customer care.
Please resolve this issue, as it is creating lots of problem to me