Being charged for Cell C Subscription on Edgars Bill

I have been being charged for a Cell C subscription fee for several months on my Edgars Bill as well as "Mobile Vault Backup Subs". I have called Edgars and no one seems to know what this is. Edgars says I must call Cell C. I have no dealings with Cell C, I have always used MTN. I want Edgars to sort this out immediately and reverse both charges for all the months they have been which is already over 6 months. Ever since Edcon sold off Edgars, Edgars has become unbearable to shop at as well as deal with. No one that works there knows what is going on!!!!!