It's after hours now (7.30pm) for S8 staff. I would suggest in the meantime, you force close - multiple times may be necessary, and you get yourselves new neighbours. Look in the Add Me forum. All the players who posted in the X Marks the Spot add me thread are active players and were able to take on new neighbours for requests.
When I did this goal last night, none of mine showed either, but I could see the news feed showed a response had been made. Force closing does work. In a short time, the goal auto completed.