ESA tribunal won, now what?

So after over a year I finally had my tribunal on the 02/08/18 and was told at the time that I had won. But that was nearly 3 months ago and I haven’t heard anything since. No letters, no back payments nothing. How long does it normally take to hear from them once the tribunal has concluded? I feel like I have been waiting forever. Should I contact the DWP or the tribunals service? Any help or advice will be much appreciated. Thanks