Handed over after i called you

So I had a vitality contract, and there was an issue with vitality, however virgin billed me with out informing me about anything. <br> <br> Now I spoke to some lady yesterday, and she says I owe 1800.00 and would give me a discount, of 50%. You shouldn't have billed me in the first place, <br> Now this morning I get a sms to say the account has been handed over, <br> <br> Guess what guys, I will be suing you. <br> <br> This is far from over.