Dish TV — subscription

Dear sir,
on 17 july we have recharched our subcriptionFor rs 660 with Shubham telecom they have said that validity will be till 20 oct & on 22 oct when we went for renewal we were shocked to note that already we have due of Rs 735 out standing even though we have received SMS 0n our mobile that our renewal due on 20 oct how come we have Rs 735 due . we are unable to understand , If we call customer care either it is engage or they dont lift the phone . Cant we have a smooth deal ? every time argument , do we want entertainment or head ache my VC no [protected] its in my dauther's name Renuka Nemivant
My cell no is 91-[protected]
I hope Matter will be taken care or if we are at fault pl explain us.