Consulting Networks review: Additional service invoices 1

Suddenly I had additional amount taken from my account, when queried I was told that an additional invoice had not been paid. All regular monthly invoices are paid by direct debit but a 'one off' service invoice for £120 was taken from my account.
It turns out that half of these charges were for a line that has not been on my account for over a year. Asked for a full refund of the rogue invoice, asked to escalate the query to a formal complaint before going to OfCom. I've had issues with this company before and it's always down to me to point out their mistakes. Now i've had enough.
Details are:
Pedro Mendes UK Retail Managing Director
Consulting Networks Limited, Unit 01, Blenheim Court, Bourges Boulevard, Peterborough, Cambridgeshire, PE1 2DU
Switchboard : [protected], Fax : [protected]
Website : www.connet.co.uk, E-Mail : [protected]@connet.co.uk