At my end with VIRGIN MOBILE

Virgin mobile ceases to exist, I was forced to move to cell c in order to port my number! Yet, virgin mobile has been debiting an amount of R199 from me, for the last who know how many months, even though they have NOT been offering me a service!!!!!! I can't get into contact with anyone from customer care as they don't operate anymore and so I put a stop order on the debit... Only to find that this is impacting me negatively on my credit score, as it's getting marked as a missed payment! How can it be a missed payment if they no longer exist and are not providing me with a service!!!