Excitel — Extra payment for same connection

Excitel website shows Rs 399 per month for 100 Mbps on 12 month payment (effective price) whereas asking me to pay Rs 822 (same plan for 12 months ).
Called customer care they are now asking again for money after paying installation amount and hanged up the call .
I am just asking provide me what you are promising on your website nothing extra .
Get this sorted or ready to receive the consumer court notice .

Customer ID : [protected]@82