Early Debit

My account was debited today for my contract. My installment debit date I have to you when I took out this contract is the 27th of each month.

You have now put my bank account into a minus because of the early debit. The contractual agreement says the 27th. If there are any missed payments or fees from my bank due to this I will be taking this further.

Do not tell me it's because the 27th falls over a weekend. You take the money the following Monday, not when there is no money in my account.

If this leaves a negative mark on my credit report I will be taking this further. I have never missed a payment nor has my bank account ever been in a minus!

Please sort this out!