Edgars **********ly debiting my account

I’ve had an clothing account with Edgars for as long as I can remember. Edgars started charging me for services I never received or even app**** for: First it was airtime. I never needed airtime because I was on contract with Vodacom. I fought this and was reimbursed by Edgars. Now Edgars is charging me for personal funeral plan a service I never even thought they offer. I’ve refused to succumb to their debt collectors .Now my ITC report is negative because of this nuisance. How do I stop Edgars from taking advantage of me and blacklisting my name? I’m tired of answering calls from the debt collectors for a service I neither required nor received.