Accusation of Lying

I had a Orderin account for a while, recently a friend created a account and used my promo code and also used my card as his card was not registered for online shopping. I checked my account later on during the day only to find out I have received credit to my account, I then used the online chat facility, only to be accused as i am breaking the T&Cs and my account has been flagged and my promotion code can no longer be used