I had a contract that charged £49 a month for a phone and data however that ended start of October and I have since upgraded to a SIM only that’s £8 a month. The problem is I am still being charged a lot more than £8 (£49, £33 ) even though I have changed my contract. I did not have any late payments since I set up a direct debit so I don’t know why the price hasn’t changed.Could I please get help asap