I signed up June. Told agent I want monthly paymen...

I signed up June. Told agent I want monthly payment. Agent said pay 26 euro upfront and ring next month to set up direct debit for monthly. When Julycame, I received an invoice of 269 plus euro which is a bill for yearly I didn't sign up with. I rang customer service who rectified the issue and set up my direct debit for monthly payment. Come end of July and my accounts been debited 269 euro!!! took my shopping money for the week!. Now I have to ring Monday to get this sorted,hopefully I won't be swearing on the phone or else I ll cancel get my money back and sign up to oxygen!