Absa you can do better

Unfair bank, i had an account to receive my salary, they created a cheque account for me and NEVER made it clear that i should cancel the account if not used. I went to the bank and laid a complaint about them sending my personal details to someone i do not know, to my surprise they made a mistake on my cell number, and when that person received sms he called the bank and they gave him my correct number , i told the consultant i will not be using the account anymore, and she never suggested i need to cancel since it is cheque years later they say i owe them?