Account transfer outstanding since Nov 2014

I have paid money into a wrong munic account in Oct 2014. Both accounts belong to me. I discover my mistake when receiving my November statement and log a request immediately via the customer care e-mail. The accept receipt of my query and asked for proof of payment which was send to them within minutes. <br> The request was not executed by the time I received the next statement and I log another call. Thereafter I repeated the exercise on a monthly basis. My last interaction was on 10 April when I called the call centre and explained my issue and receipt a call ref number. I also logged this query with others on the website available to do customers. I was disconnected before on which I drove to their offices and was my power were restored after more a less 18 hours. I am again disconnected. What else must I do to get service?