Tata Sky — Account deactivated deliberately

On dated 19 august i have logged a complain regarding set top box no signal Issue. So they send a technician for it but not found any issue it was found ok. The no signal issue created by tatasky itself and they send a technician to my home to resolved the issue. After visit the technician tatasky deactivated my account and send sms that your 170/= rupees visit charges are pending due to this your tatasky is deactivated now please recharge I called them and ask why you not informed me that it is chargeable visit. they said sorry it’s our mistake But you have to pay. Otherwise your account will deactivate They are deliberately doing this with me Yet they didn’t provide any bill regarding they are service visit charges. How can they do this thing without customer confirmation and why they are cheated the customer deliberately. They are knew that if they don’t provide any information regarding chargeable visit they cannot take charge from customer as well. Please look into this matter