Reliance Communications — request to stop services of postpaid number [protected]

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201301

Dear sir,
I want to stop all services like incoming and outgoing of the number [protected]. As i am not being to be able to use this number from last 4 5 months.
As i talked with customer care they said i need to go to retailer (Ashish mishra noida bhangel) to close this number.
But when i went to retailer he said that he need the request number for closing the number registered with customer care.
From yesterday i am not being to be able to contact customer care.
As without using this number i got bill of around 710 rupees now i want to close this number.
I request to take action.