i want answers

Good day,<br> I want answers from whoever in charge of the billing cause it seems like call centre agents are not trained well,okay my problem is I did a change of ownership this year and I keep getting calls that the account is in areas which I fail to understand cause,when u do a change of ownership the account is suppose to be update and when I go into a Cellc store I'm told it's up to date and according to me the account doesn't owe and if it does I give u the go ahead to cancel it.