Airtel Customer Care — airtel broadband and fixed lines

Sir/ madam, we had paid the full yearly plan of amount 9140 rs but the customer service is not good again there r sending top up balance message but there did not told about top up rupees 116 rs everey month to pay why should we pay i pay the top up balance total 813 and they disconnected the internet and phone calls. From past 2years we r using airtel but this year it is too bad other wise we will disconnect the airtel boardband and return our full balance amount