Catch a wake up, Sheet Street Head Office

About 3 weeks ago I recorded a complaint against Sheet Street in that I had gone to buy stuff at one of the branches and found out that my account had been closed. This due to the fact that I contacted the Customer Care and asked them to remove the "lost card protection" and "service fee" that had been charged on my NIL balance account. It seems like someone just went ahead and closed my account. I was told that the recordings would be listened to and that someone would contact me in this regard, however, it seems that the blame had been put on the branch and asked to rectify!! How??? The branch was not the problem and cannot assist me at all. They went out of their way on the mentioned day, to assist me, and after the had held on for 35 minutes, I told them to put the phone down. If the relevant people at Head Office had read my post properly, they would have realised that the branch was not the problem. And I was told that someone would contact me with 24 - 48 hours, however, to date, I have only received a call from the branch management who are not the problem and cannot rectify my problem. To top it all, I am still receiving a statement from them - how if the account is closed with a nil balance!?!?! If this problem is not rectified within the next 21 days, I will take legal action and NEVER buy anything from Sheet Street again.