Disgruntled ex customer

Edgar's demise came with alot of challenges. There customer service is non existent. I've been trying to close my account since October 2020 when I settled my account. I was instructed instore to call there callcentre to close the account and call the insurance company for my cellphone insurance to cancel account, which I did. I also emailed their account's department with a copy of my receipt with zero balance informing them to close the account. Instead they informed me that I still owe them. I enquired about the charges, which to date I did not get any explanation for. It has been an uphill battle to get any assistance from rude callcentre agents who either put you on hold and drop your call. Going to their accounts department was more disheartening, as staff tell you they got limited access to your account, therefore unable to assist. Again you put through to their callcentre, this time your told by an agent they email head office to close account, cannot confirm when it will be done. After numerous calls and instore enquiries nothing has been done and the amount I owing has also increased. I would like to know, whose in charge of Edgars account's department. Do you blame us for closing our accounts. What happened to customer service?