Wrongfully billed and black listed

I had a top up cell phone contract with Virgin Mobile for a period of 2 years and during that time a debit order of R200 a month went off every month and the account was always up to date. After 24 months I decided to move to a different service provider and cancelled my contract in person at the Virgin Mobile at Eastgate where I confirmed the cancellation in writing and was assured there are no fees involved with the cancellation. 3 months later without any notification from Virgin Mobile or any other collection department an amount of R898 got debited from my account and was told it debt collection company that represented virgin mobile. After 3 months it was finally resolved. Then now 6 years later I got handed over by them again and instantly blacklisted for R249 that no one in their intire department can tell me what it is for. It's been a struggle to get into contact with anyone in their company that knows how to resolve this. Their billing department obviously has no clue how to operate their systems and they are billing random people and black listing them. Please be weary to have any relationship with this company as it seems it will haunt you for years to come.<br>