I switched to a new plan last month which should mean my bill comes to £10.99 a month; however, a payment of £20.23 was taken on the 22nd July and I don’t see why I would be charged extra when I had not gone over my plan. Though this payment was successful, when I tried to change my direct debit details on the 26th it said a new direct debit could not be set up unless I paid the overdue amount of £20.23. I didn’t realise at this point I had already paid for this month, so I paid the £20.23 manually. I received no confirmation of payment so thought something had gone wrong and paid it again. However, now when I go to my payment history it says that £20.23 was taken on 22nd July, and two payments of £20.23 were taken on the 26th. 

So, I am unsure why my bill has come to almost twice the amount it should be, I don’t know why I had an overdue payment when it was taken from my bank account on the 22nd, and I believe I am owed £40.46 from the two manual payments I unnecessarily made.