The best restaurants serving Fast food food in Dundonald Merton London

Staff at this branch are shocking, ran by over privileged teenagers. Wanted a flat white, stood waiting to be served, 4 staff behind counter, not one of them acknowledged me, to explain they are busy and will be with me shortly (normal customer interaction). Stood there for 4 minutes waiting, staff all with their backs to me. Watched the queue build up behind me, decided to leave without a coffee. I won't be back to a Joe and the Juice, will miss the nice coffee, but not worth the shocking customer service.